All Matches

Solution Library

Expert Answer

Textbooks

Search Textbook questions, tutors and Books

Oops, something went wrong!

Change your search query and then try again

Result Not Found

Books FREE
Tutors
Study Help
Ask a Question

Search
Sign In
Register

study help
chemistry
physical chemistry

Questions and Answers of Physical Chemistry

Calculate ∆So for the following reactions, using standard entropy values. a. 2Na(s) + Cl2(g) → 2NaCl(s) b. Ag(s) + 1/2Cl2(g) → AgCl(s) c. CS2(l) + 3O2(g) → CO2(g) + 2SO2(g) d. 2CH3OH(l) +
Calculate ∆So for the following reactions, using standard entropy values. a. Pb(s) + 1/2O2(g) → PbO(s) b. CS2(g) + 4H2(g) → CH4(g) + 2H2S(g) c. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) d. Ca(s)
Calculate ∆So for the reaction C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l) See Table 18.1 for values of standard entropies. Does the entropy of the chemical system increase or decrease as you expect?
What is the change in entropy, ∆So, for the reaction CaCO3(s) + 2H+ (aq) →Ca2 + (aq) + H2O(l) + CO2(g) See Table 18.1 for values of standard entropies. Does the entropy of the chemical system
Using enthalpies of formation (Appendix C), calculate ∆Hofor the following reaction at 25oC. Also calculate ∆So for this reaction from standard entropies at 25oC. Use these values to calculate
Using enthalpies of formation (Appendix C), calculate ∆Ho for the following reaction at 25oC. Also calculate ∆So for this reaction from standard entropies at 25oC. Use these values to calculate
The free energy of formation of one mole of compound refers to a particular chemical equation. For each of the following, write that equation. a. KBr(s) b. CH3Cl(l) c. H2S(g) d. AsH3(g)
The free energy of formation of one mole of compound refers to a particular chemical equation. For each of the following, write that equation. a. MgO(s) b. COCl2(g) c. CF4(g) d. PCl5(g)
Calculate the standard free energy of the following reactions at 25oC, using standard free energies of formation. a. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l) b. CaCO3(s) + 2H + (aq) → Ca2 + (aq) +
Describe how the standard entropy of hydrogen gas at 25oC can be obtained from heat measurements.
Calculate the standard free energy of the following reactions at 25C, using standard free energies of formation. a. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) b. Na2CO3(s) + H + (aq) → 2Na +(aq) +
On the basis of G for each of the following reactions, decide whether the reaction is spontaneous or nonspontaneous as written. Or, if you expect an equilibrium mixture with significant amounts of
For each of the following reactions, state whether the reaction is spontaneous or nonspontaneous as written or is easily reversible (that is, is a mixture with significant amounts of reactants and
Calculate ∆Ho and ∆Go for the following reactions at 25oC, using thermodynamic data from Appendix C; interpret the signs of ∆Ho and ∆Go. a. Al2O3(s) + 2Fe(s) → Fe2O3(s) + 2Al(s) b.
Calculate ∆Ho and ∆Go for the following reactions at 25oC, using thermodynamic data from Appendix C; interpret the signs of ∆Ho and ∆Go. a. 2PbO(s) + N2(g) → 2Pb(s) + 2NO(g) b. CS2(l) +
Consider the reaction of 2 mol H2(g) at 25oC and 1 atm with 1 mol O2(g) at the same temperature and pressure to produce liquid water at these conditions. If this reaction is run in a controlled way
Consider the reaction of 1 mol H2(g) at 25oC and 1 atm with 1 mol Br2(l) at the same temperature and pressure to produce gaseous HBr at these conditions. If this reaction is run in a controlled way
What is the maximum work that could be obtained from 4.85 g of zinc metal in the following reaction at 25oC? Zn(s) + Cu2 +(aq) → Zn2 + (aq) + Cu(s)
What is the maximum work that could be obtained from 3.65 g of zinc metal in the following reaction at 25oC? Zn(s) + 2H + (aq) → Zn2 + (aq) + H2(g)
Give the expression for the thermodynamic equilibrium constant for each of the following reactions.a.b. c.
Describe what you would look for in a reaction involving gases in order to predict the sign of ∆So. Explain.
Write the expression for the thermodynamic equilibrium constant for each of the following reactions.a.b. c.
What is the standard free-energy change ∆Go at 25oC for the following reaction? Obtain necessary information from Appendix C. H2(g) + Br2(l) → 2HBr(g) What is the value of the thermodynamic
What is the standard free-energy change ∆Go at 25oC for the following reaction? See Table 18.2 for data. H2(g) + S(rhombic) → H2S(g) Calculate the value of the thermodynamic equilibrium constant
Calculate the standard free-energy change and the equilibrium constant Kp for the following reaction at 25 C. See Table 18.2 for data.
Calculate the standard free-energy change and the equilibrium constant Kp for the following reaction at 25oC. See Appendix C for data.
Obtain the equilibrium constant Kc at 25C from the freeenergy change for the reactionSee appendix C for data.
Calculate the equilibrium constant Kc at 25oC from the free-energy change for the following reaction:See Appendix C for data.
Use data given in Tables 6.2 and 18.1 to obtain the value of Kp at 1000oC for the reactionCarbon monoxide is known to form during combustion of carbon at high temperatures. Do the data agree with
Use data given in Tables 6.2 and 18.1 to obtain the value of Kp at 2100oC for the reactionNitric oxide is known to form in hot flames in air, which is a mixture of N2 and O2. It is present in auto
Sodium carbonate, Na2CO3, can be prepared by heating sodium hydrogen carbonate, NaHCO3. 2NaHCO3(s) → Na2CO3(s) + H2O(g) + CO2(g) Estimate the temperature at which NaHCO3 decomposes to products at
Oxygen was first prepared by heating mercury(II) oxide, HgO. 2HgO(s) → 2Hg(g) + O2(g) Estimate the temperature at which HgO decomposes to O2 at 1 atm. See Appendix C for data.
Find the sign of ∆So for the reaction 2N2O5(s) → 4NO2(g) + O2(g) The reaction is endothermic and spontaneous at 25oC. Explain the spontaneity of the reaction in terms of enthalpy and entropy
The combustion of acetylene, C2H2, is a spontaneous reaction given by the equation 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(l) As expected for a combustion, the reaction is exothermic. What is the sign
Estimate the value of ∆Ho for the following reaction from bond energies (Table 9.5). H2(g) + Cl2(g) → 2HCl(g). Is the reaction exothermic or endothermic? Note that the reaction involves the
Compare the energies of the bonds broken and those formed (see Table 9.5) for the reaction HCN(g) + 2H2(g) → CH3NH2(g) From this, conclude whether the reaction is exothermic or endothermic. What is
Acetic acid, CH3COOH, freezes at 16.6oC. The heat of fusion, ∆Hfus, is 69.0 J/g. What is the change of entropy, ∆S, when 1 mol of liquid acetic acid freezes to the solid?
Acetone, CH3COCH3, boils at 56oC. The heat of vaporization of acetone at this temperature is 29.1kJ/mol. What is the entropy change when 1 mol of liquid acetone vaporizes at 56oC?
Without doing any calculations, decide what the sign of S will be for each of the following reactions. a. 2LiOH(aq) + CO2(g) → Li2CO3(aq) + H2O(l) b. (NH4)2Cr2O7(s) → N2(g) + 4H2O(g) +
For each of the following reactions, decide whether there is an increase or a decrease in entropy. Why do you think so? (No calculations are needed.) a. N2(g) + 3H2(g) → 2NH3(g) b. NH4Cl(s) →
What is meant by the standard free-energy change ∆Go for a reaction? What is meant by the standard free energy of formation ∆Gof of a substance?
Acetic acid in vinegar results from the bacterial oxidation of ethanol. C2H5OH(l) + O2(g) → CH3COOH(l) + H2O(l) What is ∆So for this reaction? Use standard entropy values. (See Appendix C for
Methanol is produced commercially from carbon monoxide and hydrogen. CO(g) + 2H2(g) → CH3OH(l) What is ∆So for this reaction? Use standard entropy values.
Is the following reaction spontaneous as written? Explain. Do whatever calculation is needed to answer the question. SO2(g) + H2(g) → H2S(g) + O2(g)
Is the following reaction spontaneous as written? Explain. Do whatever calculation is needed to answer the question. CH4(g) + N2(g) → HCN(g) + NH3(g)
The reaction CO2(g) + H2(g) → CO(g) + H2O(g) is nonspontaneous at room temperature but becomes spontaneous at a much higher temperature. What can you conclude from this about the signs of ∆Ho
The reaction N2(g) + 3H2(g) → 2NH3(g) is spontaneous at room temperature but becomes nonspontaneous at a much higher temperature. From this fact alone, obtain the signs of ∆Ho, and ∆So,
Calculate ˆ†Go at 25oC for the reactionSee Appendix C for values of ˆ†Gof. What is the value of the solubility product constant, Ksp, for this reaction at 25oC?
Calculate ˆ†Go at 25oC for the reactionSee Appendix C for values of ˆ†Gof. What is the value of the solubility product constant, Ksp, for this reaction at 25oC?
Consider the decomposition of phosgene, COCl2 COCl2(g) → CO(g) + Cl2(g) Calculate ∆Ho, and ∆So, at 25oC for this reaction. See Appendix C for data. What is ∆Go at 25oC? Assume that ∆Ho and
Explain how ∆Go can be used to decide whether a chemical equation is spontaneous in the direction written.
Consider the reactionCalculate ˆ†Ho, ˆ†So, and ˆ†Go at 25oC for this reaction. Assume ˆ†Ho and ˆ†So are constant with respect to a change of
a. From a consideration of the following reactions, calculate Hf for methane, CH4(g). CO2(g) + 2H2(g) → HCHO(g) + H2O(g); ∆Ho(kJ) = 35 CO2(g) → C(s) + O2(g); ∆Ho(kJ) = 393 HCHO(g) + 2H2(g)
From a consideration of the following reactions, calculate Hf for ethane, C2H6(g). CH3CHO(g) + 2H2(g) → C2H6(g) + H2O(l); ∆Ho(kJ) = 204 2H2(g) + O2(g) → 2H2O(g); ∆Ho(kJ) = 484 2C2H5OH(l)
For the reactionCH3OH(l) + 3/2O2(g) †’ 2H2O(l) + CO2(g)the value of ˆ†Go is 702.2 kJ at 25oC. Other data are as follows:Calculate the absolute entropy, ˆ†So, per mole of
For the reactionHCHO(g) + 2/3O3(g) †’ CO2(g) + H2O(g)the value of ˆ†Go is 618.8 kJ/mol at 25oC. Other data are as follows:Calculate the absolute entropy, So, per mole of O3(g
Tin(IV) oxide can be reacted with either hydrogen or carbon to form tin and water vapor or carbon dioxide, respectively. See Appendix C for data. a. Calculate ∆Ho and ∆So at 25oC for the
Tungsten is usually produced by the reduction of WO3 with hydrogenWO3(s) + 3H2(g) †’ W(s) + 3H2O(g)Consider the following data:a. Is K > 1 or b. What is the value of ˆ†So at
For the decomposition of formic acid, HCOOH(l) → H2O(l) + CO(g) ∆Ho = +29 kJ/mol at 25oC. a. Does the tendency of this reaction to proceed to a state of minimum energy favor the formation of
a. Why are some reactions exothermic and others endothermic? b. Discuss the driving force in a spontaneous reaction that is highly exothermic and in one that is endothermic.
For the reaction 2Cu(s) + S(s) → Cu2S(s) ∆Ho and ∆Go are negative and ∆So is positive. a. At equilibrium, will reactants or products predominate? Why? b. Why must the reaction system be
If water faucets upstairs and downstairs are turned fully on, will more water per second flow out of the upstairs faucets or the downstairs faucets?
The sketch shows a reservoir that supplies water to a farm. It is made of wood and is reinforced with metal hoops.(a) Why is it elevated?(b) Why are the hoops closer together near the bottom part of
A block of aluminum with a weight of 10 N is placed in a beaker of water filled to the brim. Water overflows. The same is done in another beaker with a 10-N block of lead. Does the lead displace
There is a legend of a Dutch boy who bravely held back the whole North Sea by plugging a hole in a dike with his finger. Is this possible and reasonable? (See also Problem 4.)
If you've wondered about the flushing of toilets on the upper floors of city skyscrapers, how do you suppose the plumbing is designed so that there is not an enormous impact of sewage arriving at the
Why does water "seek its own level"?
Suppose that you wish to lay a level foundation for a home on hilly and bushy terrain. How can you use a garden hose filled with water to determine equal elevations for distant points?
When you are sunbathing on a stony beach, why do the stones hurt your feet less when you're standing in deep water?
If liquid pressure were the same at all depths, would there be a buoyant force on an object submerged in the liquid? Explain.
A can of diet soda floats in water, whereas a can of regular soda sinks. Explain this phenomenon first in terms of density, then in terms of weight versus buoyant force.
Why will a block of iron float in mercury but sink in water?
The mountains of the Himalayas are slightly less dense than the mantle material upon which they "float." Do you suppose that, like floating icebergs, they are deeper than they are high?
How much force is needed to hold a nearly weightless but rigid 1-L carton beneath the surface of water?
Why is it inaccurate to say that heavy objects sink and that light objects float? Give exaggerated examples to support your answer.
Why is the buoyant force on a submerged submarine appreciably greater than the buoyant force on it while it is floating?
A piece of iron placed on a block of wood makes it float lower in the water. If the iron were instead suspended beneath the wood, would the wood float as low, lower, or higher? Defend your answer.
Compared with an empty ship, would a ship loaded with a cargo of Styrofoam sink deeper into the water or rise in the water? Defend your answer.
If a submarine starts to sink, will it continue to sink to the bottom if no changes are made? Explain.
A barge filled with scrap iron is in a canal lock. If the iron is thrown overboard, does the water level at the side of the lock rise, fall, or remain unchanged? Explain.
Would the water level in a canal lock go up or down if a battleship in the lock sank?
Which do you suppose exerts more pressure on the ground-a 5000-kg elephant or a 50-kg lady standing on spike heels? (Which will be more likely to make dents in a linoleum floor?) Approximate a rough
Will a swimmer gain or lose buoyant force as she swims deeper in the water? Or will her buoyant force remain the same at greater depths? Defend your answer, and contrast it with your answer to
A balloon is weighted so that it is barely able to float in water. If it is pushed beneath the surface, will it return to the surface, stay at the depth to which it is pushed, or sink? Explain.
The density of a rock doesn't change when it is submerged in water, but your density changes when you are submerged. Explain.
In answering the question of why bodies float higher in saltwater than in freshwater, your friend replies that the reason is that saltwater is denser than freshwater. (Does your friend often answer
Suppose that you are given the choice between two life preservers that are identical in size, the first a light one filled with Styrofoam and the second a very heavy one filled with gravel. If you
The weight of the human brain is about 15 N. The buoyant force supplied by fluid around the brain is about 14.5 N. Does this mean that the weight of fluid surrounding the brain is at least 14.5 N?
The relative densities of water, ice, and alcohol are 1.0, 0.9, and 0.8, respectively. Do ice cubes float higher or lower in a mixed alcoholic drink? What comment can you make about a cocktail in
When an ice cube in a glass of water melts, does the water level in the glass rise, fall, or remain unchanged? Does your answer change if the ice cube has many air bubbles? How about if the ice cube
When the wooden block is placed in the beaker, what happens to the scale reading? Answer the same question for an iron block.
A small aquarium half-filled with water is on a spring scale. Will the reading of the scale increase or remain the same if a fish is placed in the aquarium? (Will your answer be different if the
If the gravitational field of Earth were to increase, would a fish float to the surface, sink, or stay at the same depth?
What would you experience when swimming in water in an orbiting space habitat where simulated gravity is g? Would you float in the water as you do on Earth?
We say that the shape of a liquid is that of its container. But, with no container and no gravity, what is the natural shape of a blob of water? Why?
If you release a Ping-Pong ball beneath the surface of water, it will rise to the surface. Would it do the same if it were inside a big blob of water floating weightless in an orbiting spacecraft?
So you're on a run of bad luck, and you slip quietly into a small, calm pool as hungry crocodiles lurking at the bottom are relying on Pascal's principle to help them to detect a tender morsel. What
In the hydraulic arrangement shown, the larger piston has an area that is 50 times that of the smaller piston. The strong man hopes to exert enough force on the large piston to raise the 10 kg that
In the hydraulic arrangement, the multiplication of force is equal to the ratio of the areas of the large and small pistons. Some people are surprised to learn that the area of the liquid surface in
Why will water flow more readily than cold water through small leaks in a car radiator?

Showing 3200 - 3300 of 4002

First
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Last

Get In Touch

About Us
Contact Us
Career
Jobs
FAQ
Campus Ambassador

Company Info

Security
Copyrights
Privacy Policy
Terms & Condition
SolutionInn Fee
Scholarship

Services

Sitemap
Fun
Definitions
Become Tutor
Study Help Categories
Recent Questions
Expert Questions

Copyright © 2024 SolutionInn All Rights Reserved.

Get the SolutionInn - Study Help App