for a particular reaction, δ=−144.6 kj/mol and δ=−301.2 j/(mol·k). calculate δ for this reaction at 298 k.
Answers
δG for this particular reaction at 298 K , δH=−144.6 kj/mol and δS=−301.2 j/(mol·k) is -54.84 kJ/mol.
To calculate δG for this particular reaction at 298 K, we will use the formula:
δG = δH - TδS,
Where
δG is the Gibbs Free energy, δH is the change in enthalpy, T is the temperature and δS is the change in entropy involved.
The given terms are δH = -144.6 kJ/mol, δS = -301.2 J/(mol·K), and T = 298 K.
Step 1: Convert δS to kJ/(mol·K) by dividing by 1000:
δS = -301.2 J/(mol·K) / 1000 = -0.3012 kJ/(mol·K)
Step 2: Plug in the values into the formula:
δG = δH - TδS
δG = (-144.6 kJ/mol) - (298 K × -0.3012 kJ/(mol·K))
Step 3: Perform the multiplication and subtraction:
δG = -144.6 kJ/mol + (89.7576 kJ/mol)
δG = -54.8424 kJ/mol
Therefore, the δG for this reaction at 298 K is approximately -54.84 kJ/mol.
Correct question is: for a particular reaction, δH=−144.6 kj/mol and δS=−301.2 j/(mol·k). calculate δG for this reaction at 298 k.
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Related Questions
A group of students were investigating the force of gravity. They began by dropping a foam ball from a height of 3 meters into a bucket of sand. The ball hit the sand in 0.306 seconds. They dropped additional balls of approximately the same diameter, but of different masses. Here is the data they collected. Based on this experiment and the collected data, what would their conclusion be?
A) Gravitational attraction is dependent on the mass of an object.
B) The greater the mass of the object the greater the acceleration due to gravity and the faster it will fall.
C) Mass does not affect the speed of falling objects assuming there is only the force of gravity acting on the objects.
D) Mass becomes a factor affecting the speed of a falling object when the object is dropped a great distance from the surface of the Earth.
Answers
Answer:B
Explanation:
The force of gravitation depends on the mass of the object. As the mass increases, the speed of the falling object also increases because it experience more gravitational pull from earth. Thus, option D is correct.
What is gravitational force?Gravitational force is a kind of force by which an object attracts other objects into its center of mass. We are all standing on the ground because of the gravitational pull of earth.
Gravitational force is directly proportional to the mass of the objects and inversely proportional to the distance from the surface. Therefore, the force exerted by earth on massive body is greater than that on a light body.
Here, the ball with greater mass hit the ground with less time compared to the one with less mass. Hence, the mass becomes a factor affecting the speed of a falling object when the object is dropped a great distance from the surface of the earth. Thus, the massive body will be pulled more by earth.
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it is necessary to have the spacecraft escape from the earth completely. if the spacecraft's rockets are fired at perigee, by how much would the speed have to be increased to achieve this?
Answers
The spaceship would have to accelerate by 3250 m/s to make a break for it at apogee. This is a faster increase than at perigee, so it is more effective to flee during perigee.
Why is it essential to travel at 11 km/s (the escape velocity) in order to escape the gravity of the earth when any speed will suffice as long as you keep climbing?If you begin at a speed of less than 11 km/h at ground level and don't receive any additional "push," you will fall back to the earth. You cannot slow down once you begin moving at a speed greater than 11 km/h.
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What is the speed of sound in m/s written in scientific notation?
Answers
Answer:
At 0 °C (32 °F), the speed of sound is about 331 m/s (1,086 ft/s; 1,192 km/h; 740 mph; 643 kn). The speed of sound in an ideal gas depends only on its temperature and composition.
Lee was 3,900 meters south of a grocery store, biking north at a constant velocity. He biked
one-third of the way to the grocery store in 5 minutes. What was Lee's velocity?
Write your answer as a whole number.
meters per minute to the north
Answers
One third of the total distance of 3900 m is 1300 m. The time taken to travel this distance is 5 minutes or 300 seconds. Then, the velocity of the person is 4.3 m/s.
What is velocity ?The velocity of a moving object is the measure of its distance travelled per unit time. It is a vector quantity having both magnitude and acceleration. The units of velocity are m/s, km/hr, ft./s etc.
Velocity of an object is the ratio of the change in distance to the change in time. It is given that the total distance to the grocery is 3900 m
1/3rd of 3900 m= 1300 m
Lee travels 1300 m in 5 minutes or 300 seconds,
Hence, the velocity = distance/ time
v = 1300 m / 300 s = 4.3 m/s
Therefore, the Lee has a velocity of 4.3 m/s.
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which one of the following statements is the basic principle behind the operation of a gas-filled thermometer?
Answers
the basic principle behind the operation of a gas-filled thermometer is the principle of thermal expansion. The expansion and contraction of the gas in response to temperature changes allow for accurate temperature measurements.
The basic principle behind the operation of a gas-filled thermometer is the fact that gases expand when heated and contract when cooled. This is known as the principle of thermal expansion.
When a gas-filled thermometer is exposed to a change in temperature, the gas inside the thermometer expands or contracts accordingly. This expansion or contraction causes a corresponding change in the pressure of the gas. The pressure change is then measured by the thermometer and converted into a temperature reading.
The gas-filled thermometer consists of a bulb filled with a gas, such as mercury or alcohol, connected to a narrow capillary tube. When the temperature increases, the gas inside the bulb expands, causing it to exert more pressure on the liquid in the capillary tube. This causes the liquid to rise in the tube, indicating a higher temperature. Conversely, when the temperature decreases, the gas contracts, resulting in a decrease in pressure and a corresponding drop in the liquid level in the tube.
The key idea here is that the expansion and contraction of the gas in response to temperature changes allows us to measure the temperature accurately. This principle is applied in various types of gas-filled thermometers used in various industries, including medical, scientific, and meteorological applications.
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1. we assumed that no mechanical energy is transferred to thermal energy, but saw that at least a little mechanical energy is lost. Can this explain the difference between the spring constants you found in part 1 and part 2? Please explain ?2. The mass of the puck is difficult to measure because it sublimates and looses mass over time. Can this explain the difference between the spring constants you found in part 1 and part 2.
Answers
No mechanical energy is transferred to thermal energy, but saw that at least a little mechanical energy is lost as heat.
1. Due to the vertical oscillation of the pluck connected with the spring, the spring is getting compressed and elongated. There are inter atomic bonds of the material with which the spring is made of. When the spring is getting compressed or elongated atoms connected with inter atomic bonds also gets compressed for elongated. This causes some of the bonds to break.
We know each bond is having some internal energy stored in it. So when the bond breaks that internal energy is emits in the form of thermal energy. Hence we see that some of the energy of oscillation is getting used in breaking the bond. This mechanical energy is getting lost. So with each period of oscillation the energy associated with the oscillating spring mass system decays with time.
Hence the amplitude of oscillation also decrease with time. Since by applying a certain amount of force to the pluck we are getting little small displacement compared to the actual displacement hence the corresponding spring constant will also be different compared to the actual one.
2. We know the spring constant is here define as the the ratio of applied force with the displacement of the mass. Here the force is the resultant of the weight of the mass and the the buoyancy force on the mass by the liquid. But when we sublimate the mass inside the liquid it loses mass with time. Hence the force on the spring also decays with time. Hence the the displacement of the mass also decays with time. Which implies the spring constant also changes.
Thermal power refers back to the energy contained inside a device this is liable for its temperature. warmness is the go with the flow of thermal electricity. an entire branch of physics, thermodynamics, offers with how heat is transferred among specific systems and how paintings is accomplished within the method (see the 1ˢᵗ law of thermodynamics).
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What phenomenon in hearing is analogous to spatial frequency channels in vision?
A. critical bands
B. tonal suppression
C. auditory adaptation
D. the volley principle
Answers
The phenomenon in hearing that is analogous to spatial frequency channels in vision is critical bands. Hence, the correct option is A: Critical bands.
Critical bands are regions of the audible frequency range in which a complex sound is divided into individual, discrete frequency bands by the human auditory system.
For instance, when different frequencies in a complex sound, such as a musical instrument or a human voice, are picked up by the ear, they are sent to the brain via various channels that respond to specific frequencies.
These channels are referred to as critical bands. The frequency range of these bands varies depending on the loudness of the sound.
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T/F: parallax is the apparent change in location of an object due to the motion of the observer.
Answers
True, parallax is the apparent change in location of an object due to the motion of the observer.
Parallax is a technique used in astronomy to measure the distance of nearby celestial objects, such as stars or planets, from Earth. This phenomenon occurs because the position of an object appears to change when viewed from different vantage points. The apparent change in location is due to the motion of the observer and not the actual movement of the object being observed.
For example, when you hold your thumb up in front of your face and close one eye, then switch to the other eye, your thumb appears to shift in position against the background. This shift is a result of the change in the observer's perspective, and it illustrates the concept of parallax. In astronomy, the observer's motion usually refers to the Earth's movement around the Sun, which causes nearby stars to appear to shift against the more distant background stars.
By observing this apparent change in position and knowing the baseline (the distance between the two observation points), astronomers can use trigonometry to calculate the distance to the celestial object. Parallax is an essential tool in the field of astrometry, helping astronomers understand the universe's scale and structure.
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An object that falls and accelerates solely as a result of gravity is said to be in
(2 points)
A. terminal velocity
B. free fall
C. air resistance
D. terminal acceleration
Answers
please answer correctly
Answers
Answer:pretty sure it’s 3
Explanation:
A round tube weighs 30 lbs. If the tube is stood on end it pushes down on the floor with a pressure of
2 lbs/in?. How many square inches is the end of the tube?
Answers
Answer:
15in2
Explanation:
The diagram shows part of a radio antenna.The plastic tube protects the radio antenna from bad weather.Dust particles carried by the wind rub against the plastic tube.After some time, the dust particles cause the tube to become positively charged.State the property of plastic that allows it to become electrostatically charged.
Have a good day!! :>
Suppose someone claimed to have a device that could convert heat from the room into electric power continuously. You would know that this device was a fraud because it would violate the second law of thermodynamics. Explain.
Answers
Suppose someone claimed to have a device that could convert heat from the room into electric power continuously. You would know that this device was a fraud because it would violate the second law of thermodynamics that the entropy of a closed system can only increase with time; that is, the total amount of usable energy within the system decreases over time
In thermodynamics, heat is a type of energy that is transferred between two objects with different temperatures. Heat energy flows from hot objects to colder objects and does so until the two objects reach thermal equilibrium, which is when they have the same temperature.In order to convert heat into electrical energy, you must first create a temperature difference between two objects, which requires the expenditure of energy. Then, you must use a device such as a thermocouple to convert the temperature difference into an electric current.
However, the second law of thermodynamics dictates that this process must result in a net increase in entropy, which means that the total amount of usable energy in the system must decrease overall. Therefore, a device that could convert heat from the room into electric power continuously without violating the second law of thermodynamics is impossible. This is due to the fact that such a device would require the creation of a perpetual motion machine, which is impossible according to the laws of thermodynamics.
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A 0.225 kg block of iron at -28.7 °C is put in a cup of 0.150 kg of water at 18.9 °C. What is their equilibrium temperature?
Answers
Answer:
12.3°C should be the correct answer
Answer:
12.3
Explanation:
Completion Status: A Click Submit to complete this assessment. estion 4 A 12 in diameter rod is subjected to an axial tensile load of 60 kips. Compute. a. The normal stress developed on an inclined plane at an angle of 25 with the cross section of the rod. b. The maximum normal stress developed in the rod.
Answers
The normal stress on an inclined plane at 25 degrees can be calculated using σ = F / A * cos²θ, while the maximum normal stress is σ_max = F / A_max.
a. To calculate the normal stress developed on an inclined plane, we use the formula: σ = F / A * cos²θ. Given that the diameter of the rod is 12 inches, the radius (r) is half of the diameter, which is 6 inches or 0.5 feet. The cross-sectional area of the rod (A) can be calculated using the formula for the area of a circle: A = π * r². Substituting the values, we get A = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.
Now, we can calculate the normal stress using the given axial tensile load (F) of 60 kips and the angle (θ) of 25 degrees. Since the load is given in kips (1 kip = 1000 pounds), we convert it to pounds by multiplying by 1000: F = 60 * 1000 = 60000 pounds.
Using the formula σ = F / A * cos²θ, we substitute the values and calculate the normal stress:
σ = 60000 / 0.7854 * cos²25 ≈ 95317.91 psi (pounds per square inch).
b. The maximum normal stress in the rod occurs when the inclined plane is aligned with the maximum cross-sectional area. In this case, the maximum cross-sectional area (A_max) is the same as the cross-sectional area of a circle, which is π * r². Substituting the radius value, we get A_max = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.
To calculate the maximum normal stress (σ_max), we use the formula σ_max = F / A_max. Substituting the given axial tensile load (F) of 60 kips and the maximum cross-sectional area (A_max), we calculate the maximum normal stress:
σ_max = 60000 / 0.7854 ≈ 76448.44 psi (pounds per square inch).
Therefore, the normal stress developed on an inclined plane at an angle of 25 degrees with the cross section of the rod is approximately 95317.91 psi, and the maximum normal stress developed in the rod is approximately 76448.44 psi.
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jordan has a mass of 65kg and carlos has a mass of 78.0kg. jordan is running at 5.75m/s when he is tackled by carlos who is running in the opposite direction. after the collision of both players are at rest. calculate their velocity before the collision.
Answers
Given
mj = 65 kg
mc = 78 kg
voj = 5.75 m/s
after collision
vfj = vfc = 0 m/s
Procedure
The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
\(\begin{gathered} p_o=p_f \\ m_jv_{0j}-m_cv_{0c}=0 \\ m_jv_{0j}=m_cv_{0c} \\ v_{0c}=\frac{m_jv_{0j}}{m_c} \\ v_{0c}=\frac{65kg*5.75m/s}{78kg} \\ v_{Oc}=4.8m/s \end{gathered}\)
The velocity before the collision would be 4.8m/s
3. Mary Lou is running errands for her mother. She leaves her house and goes 1 mile north to the
bakery. She then goes 2.5 miles south to get her hair cut. She continues south for 1.5 miles to
check out a book from the library. She then goes 0.75 miles north to meet a friend. This entire
voyage lasts 3 hours.
a) What is the total distance traveled? 6
b) What is the total displacemen 7
c) What was her average speed?
8
d) What was her average velocity
Answers
Answer:
Explanation:
a) The total distance travelled by Mary will be addition of the distances travelled in all directions.
Total distance travelled = 1 mile + 2.5 mile + 1.5miles + 0.75 miles
Total distance travelled = 5.75 miles
Hence the total distance traveled by Mary in her entire journey is 5.75 miles
b) Displacement is the total distance travelled in a specified direction. The displacement = 2.5 miles + (1.5- 0.75) miles = 3.25 miles
c) Speed is the change in distance with respect to time.
Speed = distance/time
Speed = 5.75/30
Speed = 0.193mi/hr
d) Average velocity is the change in displacement with respect to time.
Velocity = displacement/time
Velocity = 3.750/30
Velocity = 0.125mi/hr
which statements accurately describe mechanical waves
Answers
Answer:
Explanation:
so a mechanical wave transfers energy through a medium but unlike other waves that move through very long distances
the distance of the mechanical wave is different
7. a. How is speed related to kinetic energy?
Answers
Increase in speed leads to increase in kinetic energy
A bus negotiates a curve of radius 487 m. What force will be exerted on an 80 kg passenger by the outside wall of the bus when it is traveling at 60 km/h?
Answers
Answer:
Centrifugal Force = 45.65N
Explanation:
Given the following data;
Mass, m = 80kg
Radius = 487m
Velocity = 60km/h to m/s = 60*1000/3600 = 16.67m/s
To find the centrifugal force;
Centrifugal Force = mv²/r
Substituting into the equation, we have;
Centrifugal Force = 80*16.67²/487
Centrifugal Force = 80*277.89/487
Centrifugal Force = 2223.12/487
Centrifugal Force = 45.65N
The thymus gland plays an important role in the developing immune system of a child. It makes infection-fighting lymphocytes called
.
Answers
Answer:
give brainliest please
Explanation:
T- lymphocytes or T cells
Write a paragraph describe the desert biome
Answers
Answer:
The desert biome is an ecosystem that forms due to the low level of rainfall it receives each year. Deserts cover about 20% of the Earth. There are four major types of desert in this biome - hot and dry, semiarid, coastal, and cold. They are all able to inhabit plant and animal life that are able to survive there. Although the daytime temperatures of the desert biome are very hot, they can get very cold at night. The Sahara Desert is the largest desert in the desert biome. It covers over 300 million square miles.
Explanation:
The distance between earth and sun is 15000000km. Light takes 499 seconds to reach earth from sun. Calculate the speed of light from the data provided. Mention the unit as well.
Answers
Answer:
The speed of light is 30,060,120.24048 m/s.
Explanation:
15000000 km into m
1 km = 1000m
15000000 km = 15000000 × 1000 m
= 15000000000m
speed = distance travelled / time taken
or, speed = 15000000000/499 m/s
so, speed = 30,060,120.24048m/s
To solve the problem we must know about the relationship between Speed, distance, and Time.
What is the relationship between Speed, distance, and Time?We know that sped, distance, and time all are in a relationship to each other. this relationship can be given as,
\(\rm{Speed = \dfrac{Distance}{Time}\)
The speed of the light is 30,060.12 km/sec.
Given to us
The distance between the earth and the sun is 15000000km Light takes 499 seconds to reach earth from the sun.We know that speed can be described as,
\(\rm{Speed = \dfrac{Distance}{Time}\)
Therefore,
What is the speed of the light?\(\text{Speed of light} = \dfrac{\text{Distance between the earth and the sun}}{\text{Time taken by the light to travel the distance}}\)
Substitute the value,
\(\text{Speed of light} = \dfrac{15,000,000\ km}{499\ seconds}\)
\(\text{Speed of light} = 30,060.12\ km/sec\)
Hence, the speed of the light is 30,060.12 km/sec.
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What voltage is necessary to produce a current of 200 amperes through a
Resistance of 1 x 10-3 ohms?
Answers
The voltage necessary to produce a current of 200 amperes through a resistance of 1 x 10^-3 ohms is 0.02 volts.
What voltage is required to achieve a current of 200 amperes through a resistance of 1 x 10^-3 ohms?To determine the voltage required, we can use Ohm's Law, which states that voltage (V) is equal to the current (I) multiplied by the resistance (R).
Write down the values given in the problem.
Current (I) = 200 amperes
Resistance (R) = 1 x 10^-3 ohms
Apply Ohm's Law to calculate the voltage.
\(V = I * R\\V = 200 A * 1 x 10\^ \ -\ 3 \ohm\Ω\\V = 0.02 volts\)
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9
8
7
VELOCITY (M/S)
Xena
- Gabrielle
2
1
0
0
10
20
30
40
50
TIME (5)
Was Xena and Gabrielle accelerating?
Answers
Answer:
6
Explanation:
cause logic
What is the total pressure exerted by a mixture containing two gases if the partial pressure of one gas is 70 torr and the partial pressure of the other gas is 30 torr? 100 torr40 torr70 torr30 torr
Answers
If one gas's partial pressure is 70 torr as well as the second gas's partial pressure is 30 torr, then the total force exerted by such a mixture including those two gases is 100 torr.
What is pressure and its SI unit?Pressure is characterised as the thrust acting per unit area of a body (perpendicular force on a surface). Mathematically, it can be stated as follows: Pascal is the SI unit of pressure (Pa). One Pascal is the amount of pressure one Newton of force produces over a one-meter-squared surface. In addition, 1 P a = 1 N / m 2.
What type of energy is pressure?Air pressure is described as that of the average energy transfer every unit area per unit time caused by molecular collisions between such a confined gas as well as its boundary in the kinetic theory for ideal gases. A surface's pressure can be expressed as the amount of force applied per square inch. Pressure P=F/A if normal Force is applied to area A.
Total pressure = 70torr + 30torr
=100torr.
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How to integrate 1/ 1 + x2
Answers
The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.
Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.
Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:
∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du
The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.
Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.
Let us work through the steps:
Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x
Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du
Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.
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before a thunder storm, clouds in the sky likely become
Answers
Before a thunderstorm, clouds in the sky likely become dark and cumulonimbus in nature. These clouds are responsible for producing thunder, lightning, and heavy rain associated with thunderstorms.
Before a thunderstorm, the clouds in the sky likely become dark, heavy, and sometimes even greenish in color due to the build-up of moisture and electric charge in the atmosphere.
The clouds may also become thicker and lower in altitude, sometimes producing gusty winds and lightning strikes. This is a sign that a thunderstorm is approaching and it is important to seek shelter indoors and stay away from open areas, bodies of water, and tall objects.
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A cup of black coffee cools faster than a cup of black coffee with milk. This is because black coffee...
A. reflects heat better
B. absorbs less heat
C. radiates heat better
D. conducts more heat
please give explanation to ur answer and please be logical
Answers
Answer:
ofcourse milk free coffee is cool faster.
Explanation:
Keep the two liquid separate, however and uh maintain maximum temperature,so that Milk free coffee cools faster.one time uh added milk the coffee temperature drops,the delta between them and the surrounding air is reduced and the rate of cooling slows ..
A 10.0-kg mass is placed on a 25.0o incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.580, and the coefficient of sliding friction is 0.520. The mass is given a shove causing it to slide down the incline. What is the frictional force while the mass is sliding
Answers
The frictional force while the mass is sliding will be 46.2 N.
What is friction force?
Opposition forces on the surface cause heat loss during the motion of an object known as the friction force.
Given data:
m(mass)= 10.0-kg
Θ (Inclination angle)=25.0o
Coefficient of sliding friction,\(\rm \mu_k\)=0.520
Coefficient of static friction,\(\rm \mu_s=0.520\)
The friction force, F=?
Resolve the force in the inclined plane;
\(\rm F=\mu_s mg cos25^0 \\\\ F=0.520 \times 10 \times 9.81 \times cos 25 ^0 \\\\ F= 46.2 \ N\)
Hence, the frictional force while the mass is sliding will be 46.2 N.
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Given the mathematical representation of Coulomb’s Law, , where , describe in words the relationship among electric force, charge, and distance.
Answers
Answer:
\(F_c = \frac{KQ_1Q_2}{R^2}\)
Explanation:
Coulomb’s law is given as;
\(F_c = \frac{KQ_1Q_2}{R^2}\)
where;
F is the electric force between q₁ and q₂
k is the coulomb’s constant = 9 x 10⁹ Nm²/C²
r is the distance between the two charges
q₁ and q₂ are the two charges
Therefore, the coulomb’s law is given as \(F_c = \frac{KQ_1Q_2}{R^2}\)