The molar heat of fusion for Iodine is 16. 7 kJ/mol. The specific heat capacity liquid Iodine is 0. 054 J/g degrees C.
Calculate the amount of energy (in KJ) required to melt 352 g of solid Iodine and then heat the liquid to 180 degrees C? The melting point of Iodine is 114 degrees C
Answers
The total amount of energy required to melt 352 g of solid Iodine and heat the resulting liquid to 180°C is 29.63 kJ.
The amount of energy required to melt 1 mol of Iodine is given as the molar heat of fusion, which is 16.7 kJ/mol. Therefore, the amount of energy required to melt 352 g of solid Iodine can be calculated as follows:
Number of moles of Iodine = Mass ÷ Molar mass
= 352 g ÷ 126.90 g/mol
= 2.78 mol
Energy required to melt 352 g of Iodine = Number of moles × Molar heat of fusion
= 2.78 mol × 16.7 kJ/mol
= 46.43 kJ
After the solid Iodine has melted, the resulting liquid must be heated from its melting point of 114°C to the final temperature of 180°C. The specific heat capacity of liquid Iodine is given as 0.054 J/g°C. Therefore, the amount of energy required to heat the liquid can be calculated as follows:
Energy required to heat the liquid Iodine = Mass × Specific heat capacity × Temperature change
= 352 g × 0.054 J/g°C × (180°C - 114°C)
= 1.67 kJ
The total amount of energy required to melt 352 g of solid Iodine and heat the resulting liquid to 180°C is therefore:
Total energy required = Energy required to melt the solid Iodine + Energy required to heat the liquid Iodine
= 46.43 kJ + 1.67 kJ
= 29.63 kJ
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Related Questions
a 135 g sample of carbon disulfide requires 43.2 kj of heat to vaporize completely. what is the enthalpy of vaporization for carbon disulfide?
Answers
The enthalpy of vaporization for carbon disulfide is 0.32 kJ/g.
The enthalpy of vaporization (ΔHvap) for carbon disulfide can be calculated using the formula:
ΔHvap = q/m
Where q is the heat required to vaporize the sample and m is the mass of the sample.
Substituting the given values, we get:
ΔHvap = 43.2 kJ / 135 g
ΔHvap = 0.32 kJ/g
Therefore, the enthalpy of vaporization for carbon disulfide is 0.32 kJ/g.
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Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?
Answers
The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.
The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.
Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.
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which of the following best describes the interaction between water molecules?
Answers
The interaction between water molecules is primarily characterized by hydrogen bonding.
Are water molecules connected by hydrogen bonds?Water molecules exhibit a unique type of interaction known as hydrogen bonding. Hydrogen bonding occurs when the positively charged hydrogen atom of one water molecule is attracted to the negatively charged oxygen atom of another water molecule.
This creates a relatively strong intermolecular force that holds the water molecules together. In a water molecule, oxygen (O) and hydrogen (H) atoms are covalently bonded.
The oxygen atom has a slightly negative charge due to its higher electronegativity, while the hydrogen atoms carry a partial positive charge. This uneven distribution of charge within the molecule creates polar characteristics, making water a polar molecule.
When water molecules come into proximity, the positive end of one molecule (hydrogen) attracts the negative end of another molecule (oxygen). This attraction forms a hydrogen bond, which is a type of dipole-dipole interaction.
The hydrogen bond is weaker than a covalent or ionic bond but stronger than other intermolecular forces. Hydrogen bonding gives water several unique properties, including its high boiling and melting points, surface tension, and ability to dissolve a wide range of substances.
These properties are crucial for life on Earth as they facilitate various biological processes and allow water to act as a universal solvent. The unique properties of water and the role of hydrogen bonding in shaping its behavior are essential topics in chemistry and biology.
Understanding the nature of water molecules and their interactions provides insights into many scientific phenomena. Exploring the concept of hydrogen bonding in more depth can lead to fascinating discoveries in fields such as materials science, biochemistry, and environmental studies.
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does anyone know the answer to this riddle???
Answers
Answer:
babe where are u???????!
Explanation:
babe plz text me im lowkey freaking out rn
the student then prepares a solution using four pellets of naoh dissolved to 100.00 ml in a volumetric flask. the student slowly adds this to the khp solution to perform a titration. it requires 22.50 ml of the naoh solution to reach the endpoint. what is the molarity of the naoh solution based on this titration?
Answers
The volume of NaOH solution used in the titration is 22.50 mL or 0.0225 L. The molarity of the NaOH solution is 0.210 mol/L.
To determine the molarity of the NaOH solution, we can use the balanced chemical equation for the reaction between NaOH and KHP:
NaOH + KHP → NaKP + H2O
From the equation, we can see that one mole of NaOH reacts with one mole of KHP. Therefore, the number of moles of NaOH used in the titration can be calculated by:
moles NaOH = molarity of NaOH solution × volume of NaOH solution used (in liters)
The volume of NaOH solution used in the titration is 22.50 mL or 0.0225 L.
To calculate the molarity of the NaOH solution, we need to determine the number of moles of NaOH used in the titration. From the balanced equation, we can see that one mole of KHP reacts with one mole of NaOH. The mass of KHP used in the titration is 0.969 g, which corresponds to the number of moles of KHP used:
moles KHP = mass of KHP / molar mass of KHP
= 0.969 g / 204.22 g/mol
= 0.004738 mol
Since the stoichiometry of the reaction is 1:1, the number of moles of NaOH used in the titration is also 0.004738 mol. Substituting these values into the above equation, we get:
0.004738 mol = molarity of NaOH solution × 0.0225 L
Solving for the molarity of the NaOH solution, we get:
molarity of NaOH solution = 0.004738 mol / 0.0225 L
= 0.210 mol/L
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Write an equation for the dissociation of each of the following ionic compounds
in water.
a. LiOH
b. K2CRO4
c. CaCl₂
d. (NH4)3PO4
e. Mg(C₂H3O2)2
f. AlBr3
g. Na2HPO4
h. Fe(NO3)2
Answers
When lithium hydroxide (LiOH) is dissolved in water, the reaction results in the dissociation of lithium (Li+) and hydroxide (OH-) ions
What is an example of a dissociation reaction?Water dissociates into hydrogen and hydroxide ions in a reaction known as a dissociation. A chemical event known as ionization occurs when a molecular molecule splits into ions. Because of dissociation, acids generate hydrogen ions.
A dissociation reaction: why is it?When one molecule splits into two smaller ones, a dissociation reaction takes place, which results in a loss of energy. Decomposition processes, which are sometimes known as dissociation reactions, are those in which a big molecule is broken down into smaller components.
a. LiOH → Li+ + OH-
b. K2CrO4 → 2K+ + CrO42-
c. CaCl₂ → Ca2+ + 2Cl-
d. (NH4)3PO4 → 3NH4+ + PO43-
e. Mg(C2H3O2)2 → Mg2+ + 2C2H3O2-
f. AlBr3 → Al3+ + 3Br-
g. Na2HPO4 → 2Na+ + HPO42-
h. Fe(NO3)2 → Fe2+ + 2NO3-
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what is the hybridization of the oxygen atom in a water molecule?
Answers
During the formation of a water molecule, we focus on the oxygen atom. In hybridization of H2O, the oxygen atom is sp3hybridized.
If we dissolve 38 g of salt in 239 g of water, what is the mass of the resulting solution?
Answers
As a result of this process, the proportions of oxygen and carbon dioxide in
air breathed in and air breathed out change.
Which one of the statements is true? Tick the correct box. [1]
- Air breathed out has less carbon dioxide and more oxygen than air breathed in.
- Air breathed out has less carbon dioxide and less oxygen than air breathed in.
- Air breathed out has more carbon dioxide and less oxygen than air breathed in.
- Air breathed out has more carbon dioxide and more oxygen than air breathed in.
Answers
Answer:
the third one
Explanation:
When you breathe in, you inhale oxygen and exhale carbon dioxide
For the reaction
A(g) + 2B(g) + C(g)
Kc= 5.0 at 100°C. If the equilibrium concentrations of [A] = 0.1 M and [B] = 0.2 M at 100°C, what is the [C]eq at this temperature?
![For the reactionA(g) + 2B(g) + C(g)Kc= 5.0 at 100C. If the equilibrium concentrations of [A] = 0.1 M](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/J2h5PSvqcTt6j7kI4DAb0QTWcpjMVrve.png)
Answers
Answer:
Hi Sopia the answer is 0.02m
.25 g of each of the following gasses are taken at 27°C and 600 mm
Hg pressure. Which of these will have the least volume?
(Molar mass (g/mole): HCI = 36.5, HBr = 81, HI = 128, HF = 20)
(R=0.082 Latm/K.mole)
A. HC1
B. HBr
C. HI
D. HF
Answers
HI has the least volume
Further explanationGiven
Gasses and molar mass
Required
The least volume
Solution
Ideal gas law
PV=nRT
V = (nRT)/P
n = mass : MW(Molar weight=molar mass)
\(\tt V=\dfrac{\dfrac{mass}{MW}RT }{P}\\\\V=\dfrac{mass.RT}{MW.P}\)
so V is inversely proportional to MW(molar mass)
Because the values of P, R, T, and mass are the same, what matters is the value of the molar mass of each compound. The larger the molar mass the smaller the volume
From the available molar mass data, HI has the largest molar mass, so HI has the smallest volume
Based on this experiment which substance has the highest specific heat capacity?
Select one:
a. lead
b. ice
c. granite
d. copper
Answers
plz mark brainlyest
Which of the following represents the net ionic equation between silver carbonate and hydrochloric acid? Agt + Cl → AgCl(s)
CO;²+2H* → H₂O + CO₂(g)
AgaCO₂ (s) + 2H* → 2Ag + H₂CO3
Answers
The net ionic equation between silver carbonate and hydrochloric acid is Ag₂CO₃(s) + 2H+(aq) → 2Ag+(aq) + CO₂(g) + H₂O(l).
In this reaction, the silver carbonate (Ag₂CO₃) reacts with hydrochloric acid (HCl) to form silver ions (Ag⁺) and carbon dioxide (CO₂) gas.
The chloride ion (Cl-) from the hydrochloric acid does not participate in the reaction and remains as a spectator ion.
The net ionic equation represents only the species that undergo a chemical change, ignoring the spectator ions. This equation can help to simplify the understanding of a chemical reaction and identify the key components involved in it.
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What are the two types of taxes that working individuals pay on their earnings?
(1) individual income tax and sales tax
(2) payroll tax and sales tax
(3) individual income tax and social insurance taxes
(4) property tax and payroll tax
(5) sales tax and income tax
Answers
There are actually two types of taxes that working individuals pay on their earnings. The first one is individual income tax, which is a tax levied on the income of individuals or households.
The second one is social insurance taxes, which are taxes collected to fund social security and Medicare programs. Therefore, the correct answer to this question would be (3) individual income tax and social insurance taxes. Sales tax and income tax are not necessarily paid by working individuals on their earnings, so option (5) is not correct.
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The half life carbon -14 is 5730 years if 6-25% of the original percent nuclei were left in the sample how old is the sample? how many daughter nuclei (in percent) are found in the sample?
Answers
If 6-25% of the original percent nuclei were left in the sample, then the sample would be about 12,000 years old.
The daughter nuclei in the sample are found at a rate of 1/5730 = 0.0013% per year, or 13% per thousand years.
We do this by using a mass spectrometer. A mass spectrometer can break down any compound into its constituent parts, and then measure each part individually. When we do this for carbon-14, we find that there are 5730 years until half of it decays away—that's when we can add another 6% of it to our sample and expect to have another 5730 years until half of that decays away as well.
So if 6% of the original amount was left in the sample after 5730 years (half life), then there must be 5730 * 0.06 = 1520 daughter nuclei still present (in percent) in the same sample after 5730 years.
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The formula of methane is CH4. The symbols for the two elements in methane are C and H. Give the names of these two elements.
Answers
Answer:
Carbon and Hydrogen
Explanation:
So the C stands for Carbon and H is for Hydrogen. Methane (CH4) is made up of one atom of Carbon and 4 atoms of Hydrogen.
Hope this helps
Blood rich in carbon dioxide was called venous blood, as it was believed that only the veins carried this type of blood. Based on what you know about the circulatory system, explain why this statement is incorrect.
Answers
Answer:
Yes is incorrect
Explanation:
not all veins carry blood rich in CO2 , the pulmonary vein carries blood with O2 which means that not all veins carry blood rich in CO2
According to the
graph, what happens
to the concentration
of A over time?
Concentration (M)
Reaction: 2A A₂
Time (sec)
A. It decreases and then levels out.
B. It decreases consistently.
C. It increases and then levels out.
D. It increases consistently.
Answers
The concentration of A decreases and then levels out. Option A
How does concentration of the reactant change?
In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.
At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.
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Select the correct answer. What changes would occur at a molecular level if a liquid is placed in cool conditions? A. The motion of the molecules would remain the same. B. The motion of the molecules would increase. C. The motion of the molecules would decrease. D. The motion of the molecules would stop.
Answers
Answer:
c.
Explanation:
The motion of the molecules would decrease
how many molecules of h2s are required to form 79.0 g of sulfur according to the following reaction? assume excess so2.
Answers
9.89X10^23 molecules of H2S are required to form 79.0 g of sulfur
The molar mass of sulfur is 32.07g/mol. The calculation to determine the number of molecules of H2S using the balanced equation is
molecule H2S=79x 1/32.07gX 2moles H2S/3 moles S x 6.022x 10^23/1 mol H2S
molecule of H2S=9.89 X 10^23 molecules H2S
A substance's molar mass is the mass in grams of one mole of the substance. As demonstrated in this video, the molar mass of a substance can be calculated by adding the molar masses of its constituent atoms. The calculated molar mass can then be used to convert between mass and the number of moles of the substance.
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HELPPPP DUE NOWWW (5)
Answers
Answer:
All the answers you chose are correct
Explanation:
Answer:
I cant see the fist question but all that you chose are correct
Explanation:
identify the following species as either lewis acid or lewis base. use the lewis electron-dot symbol to show lone pairs (if any) on atoms, lewis structures for molecules, and the octet rule. fe3 br- h2o bf3 n g
Answers
Lewis acid: Fe3+, BF3
Lewis base: Br-, H2O, N
The Lewis electron-dot symbol and Lewis structures are used to show the distribution of electrons and the octet rule is used to determine the stability of molecules.
In Lewis acid-base theory, a Lewis acid is an electron pair acceptor and a Lewis base is an electron pair donor.
Fe3+ is a Lewis acid because it can accept a pair of electrons to form a coordinate covalent bond.
Br- is a Lewis base because it has a lone pair of electrons available for donation.
H2O is a Lewis base because it has two lone pairs of electrons on the oxygen atom available for donation.
BF3 is a Lewis acid because it has an incomplete octet and can accept a pair of electrons to form a coordinate covalent bond.
N is a Lewis base because it has a lone pair of electrons available for donation.
In summary, Fe3+ and BF3 act as Lewis acids because they can accept electron pairs, while Br-, H2O, and N act as Lewis bases because they can donate electron pairs. The Lewis electron-dot symbol and Lewis structures are used to show the distribution of electrons and the octet rule is used to determine the stability of molecules.
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how many carbon atoms are there in a 2.6-carat diamond? diamonds are a form of pure carbon. ( 1 carat
Answers
2.8 x 10^9 atoms carbon atoms are there in a 2.6-carat diamond. diamonds are a form of pure carbon
Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons can be used to create covalent chemical connections. The periodic table's group 14 is where it belongs. Only 0.025 percent of the crust of the Earth is made up of carbon. Crude oil, methane gas, and coal are used as fuel sources (which is used to make gasoline). All kinds of materials i.e diamond, including polymers and steel alloys, are made with it (a combination of carbon and iron)
2.8 carat C x (0.20g C/ 1 carat C) x (1 mole C/ 12.01 g C) x (6.02 x 10^23 atoms C/ 1 mole C)
= 2.8 x 10^9 atoms C
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Which statement correctly describes atoms? Choose all that apply. Responses
Atoms of all substances have the same chemical properties.
Atoms are easily destroyed when matter is cooled or heated. Atoms are the smallest unit of an element that has the chemical identity of that element. Atoms combine to make all the substances on Earth.
Answers
Atoms are smallest particle of any entity; Atoms consist of three fundamental types of particles, protons, electrons and neutrons. Option C & D are the correct statement.
Define an atom?
Atoms are the smallest particle of an element. Atoms cannot be broken into sub parts. It consisting of 3 particles like, protons, electrons and neutrons.
Atoms of the all substance do not have same chemical properties. Because, atoms have different number of proton and electrons. Atoms cannot be destroyed by heating or cooling. Smallest unit atoms have elemental chemical identity and atoms can combine to make all the substance on earth.
Therefore, statement C and D are correct.
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The statement that correctly describes atoms are:
c. Atoms are the smallest unit of an element that has the chemical identity of that element.
d. Atoms combine to make all the substances on Earth.
What are atoms?The tiniest component of an element is called an atom. Atoms are not divisible into smaller components. It is made up of three different particles: protons, electrons, and neutrons.
All atoms do not share the same chemical characteristics. Because the quantity of protons and electrons in each atom varies. No amount of heat or cold can kill an atom.
Therefore, the correct option is c and d.
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How many liters would be in 7.65 moles of a gas!
Answers
7.65 moles of gas at STP would occupy a volume of approximately 171.36 liters.
To find out how many liters are in 7.65 moles of a gas, you will need to use the Ideal Gas Law equation, which is:
PV = nRT
In this equation:
P = pressure of the gas
V = volume of the gas in liters
n = number of moles of the gas
R = ideal gas constant (0.0821 L atm/mol K)
T = temperature in Kelvin
However, since we are not given the values for pressure (P) and temperature (T), we cannot calculate the exact volume (V) in liters for 7.65 moles of a gas.
If we assume standard temperature and pressure (STP) conditions, which are 0°C (273.15 K) and 1 atm, we can use the molar volume of a gas at STP, which is 22.4 liters/mol.
To calculate the volume in liters at STP, you can use the following formula:
V = n × molar volume at STP
Now, plug in the values:
V = 7.65 moles × 22.4 liters/mol
V ≈ 171.36 liters
So, under STP conditions, 7.65 moles of gas would be approximately 171.36 liters.
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how glass tube filed with acidified potassium dichromate detect drunken driver
Answers
Answer:
See explanation
Explanation:
The reaction between alcohol and acidified potassium dichromate is a redox reaction. This reaction can be used to detect a drunken driver.
Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.
The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.
Hydrogen reacts with oxygen to form a compound called: a. Oxidation b. Oxide c. Metal d. None of the above
Answers
Answer:
Hydrogen reacts with oxygen to form a compound called hydrogen peroxide so your answer is none of the above.
Explanation:
Hope it will help you :)
Answer:oxide
Explanation:
The reaction ofhydrogen and oxygen result on hydrgen peroxide which is a part is oxide
7. 06 equilibrium lab report
I need it bad if anybody has it
Answers
Chemical equilibrium is a dynamic equilibrium that is affected by changes in temperature, concentration and pressure
What is chemical equilibrium?Chemical equilibrium is a dynamic state in a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.
For a reaction in equilibrium, the following factors affect equilibrium:
temperature pressure concentrationThe principle of chemical equilibrium states that in an isolated system in equilibrium, equilibrium will shift to annul any constraint applied in the system.
Therefore, chemical equilibrium is dynamic and is affected by temperature, concentration and pressure.
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what happens to your body if carbon dioxide is not removed
Answers
Explanation:
can damage the tissues and organs and further impair oxygenation of blood
The energy required to raise the temperature of 1 kg of water by 1°C is what?
Answers
Answer:
Specific heat capacity