Chemistry: Atoms First
2nd Edition
ISBN: 9780073511184
Author: Julia Burdge, Jason Overby Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 14, Problem 14.16QP
For each pair of substances listed here, choose the one having the larger standard entropy value at 25°C. The same molar amount is used in the comparison. Explain the basis for your choice, (a) Li(s) or Li(l), (b) C2H5OH(l) or CH3OCH3(l) (Hint: Which molecule can hydrogen bond?), (c) Ar(g) or Xe(g), (d) CO(g) or CO2(g), (e) O2(g) or O3(g), (f) NO2(g) or N2O4(g).
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Chapter 14 Solutions
Chemistry: Atoms First
Ch. 14.3 - Determine the change in entropy for 1.0 mole of an...Ch. 14.3 - Determine the change in entropy (Ssys) for the...Ch. 14.3 - To what fraction of its original volume must a...Ch. 14.3 - From the standard entropy values in Appendix 2,...Ch. 14.3 - Prob. 2PPACh. 14.3 - In each of the following reactions, there is one...Ch. 14.3 - For each reaction shown in the diagrams, indicate...Ch. 14.3 - For each process, determine the sign of S for the...Ch. 14.3 - Prob. 3PPACh. 14.3 - Make a qualitative prediction of the sign of Hsoln...
Ch. 14.3 - Consider the gas-phase reaction of A2 (blue) and...Ch. 14.3 - Prob. 14.3.1SRCh. 14.3 - Prob. 14.3.2SRCh. 14.3 - Prob. 14.3.3SRCh. 14.4 - Determine if each of the following is a...Ch. 14.4 - For each of the following, calculate Suniv and...Ch. 14.4 - (a) Calculate Suniv and determine if the reaction...Ch. 14.4 - The following table shows the signs of Ssys,...Ch. 14.4 - Prob. 14.4.1SRCh. 14.4 - Prob. 14.4.2SRCh. 14.4 - Prob. 14.4.3SRCh. 14.5 - According to Table 14 4, a reaction will be...Ch. 14.5 - A reaction will be spontaneous only at low...Ch. 14.5 - Given that the reaction 4Fe(s) + 3O2(g) + 6H2O(l) ...Ch. 14.5 - Prob. 5PPCCh. 14.5 - Prob. 14.6WECh. 14.5 - Prob. 6PPACh. 14.5 - For each reaction, determine the value of Gf that...Ch. 14.5 - Prob. 6PPCCh. 14.5 - Prob. 14.7WECh. 14.5 - Prob. 7PPACh. 14.5 - Prob. 7PPBCh. 14.5 - Prob. 7PPCCh. 14.5 - Prob. 14.5.1SRCh. 14.5 - Prob. 14.5.2SRCh. 14.5 - Prob. 14.5.3SRCh. 14 - Explain what is meant by a spontaneous process....Ch. 14 - Which of the following processes are spontaneous...Ch. 14 - Prob. 14.3QPCh. 14 - Prob. 14.4QPCh. 14 - Prob. 14.5QPCh. 14 - Prob. 14.6QPCh. 14 - Prob. 14.7QPCh. 14 - Consider two gas samples at STP: one consisting of...Ch. 14 - Now consider the reaction F2(g)2F(g)at constant...Ch. 14 - Which of the following best describes why entropy...Ch. 14 - Which of the following best explains why entropy...Ch. 14 - How does the entropy of a system change for each...Ch. 14 - How does the entropy of a system change for each...Ch. 14 - Predict whether the entropy change is positive or...Ch. 14 - Prob. 14.11QPCh. 14 - Prob. 14.12QPCh. 14 - Prob. 14.13QPCh. 14 - Using the data in Appendix 2, calculate the...Ch. 14 - Using the data in Appendix 2, calculate the...Ch. 14 - For each pair of substances listed here, choose...Ch. 14 - Arrange the following substances (1 mole each) in...Ch. 14 - State the second law of thermodynamics in words,...Ch. 14 - State the third law of thermodynamics in words,...Ch. 14 - Calculate Ssurr for each of the reactions in...Ch. 14 - Calculate Ssurr for each of the reactions in...Ch. 14 - Using data from Appendix 2, calculate Srxn and...Ch. 14 - Using data from Appendix 2, calculate Srxn and...Ch. 14 - When a folded protein in solution is heated to a...Ch. 14 - Define free energy. What are its units?Ch. 14 - Why is it more convenient to predict the direction...Ch. 14 - What is the significance of the sign of Gsys?Ch. 14 - From the following combinations of H and S,...Ch. 14 - Prob. 14.29QPCh. 14 - Calculate G for the following reactions at 25C....Ch. 14 - Calculate G for the following reactions at 25C....Ch. 14 - From the values of H and S, predict which of the...Ch. 14 - Find the temperatures at which reactions with the...Ch. 14 - The molar heats of fusion and vaporization of...Ch. 14 - The molar heats of fusion and vaporization of...Ch. 14 - Use the values listed in Appendix 2 to calculate G...Ch. 14 - Certain bacteria in the soil obtain the necessary...Ch. 14 - What is a coupled reaction? What is its importance...Ch. 14 - What is the role of ATP in biological reactions?Ch. 14 - Prob. 14.40QPCh. 14 - Predict the signs of H, S, and G of the system for...Ch. 14 - A student placed 1 g of each of three compounds A,...Ch. 14 - The enthalpy change in the denaturation of a...Ch. 14 - Consider the following facts: Water freezes...Ch. 14 - Ammonium nitrate (NH4NO3) dissolves spontaneously...Ch. 14 - The standard enthalpy of formation and the...Ch. 14 - (a) Troutons rule states that the ratio of the...Ch. 14 - Referring to Problem 14.47, explain why the ratio...Ch. 14 - Prob. 14.49QPCh. 14 - Prob. 14.50QPCh. 14 - Prob. 14.51QPCh. 14 - Prob. 14.52QPCh. 14 - Prob. 14.53QPCh. 14 - The molar heat of vaporization of ethanol is 39 3...Ch. 14 - As an approximation, we can assume that proteins...Ch. 14 - When a native protein in solution is heated to a...Ch. 14 - A 74.6-g ice cube floats in the Arctic Sea. The...Ch. 14 - A reaction for which H and S are both negative is...Ch. 14 - The sublimation of carbon dioxide at 78C is given...Ch. 14 - Many hydrocarbons exist as structural isomers,...Ch. 14 - Consider the following reaction at 298 K. 2H2(s) +...Ch. 14 - Which of the following is not accompanied by an...Ch. 14 - Which of the following are not state functions: S,...Ch. 14 - Give a detailed example of each of the following,...Ch. 14 - Hydrogenation reactions (e.g., the process of...Ch. 14 - At 0 K. the entropy of carbon monoxide crystal is...Ch. 14 - Which of the following thermodynamic functions are...Ch. 14 - Using Gf values from Appendix 2, calculate the...Ch. 14 - Prob. 14.2KSPCh. 14 - Using Grxnvalues from Appendix 2, calculate the...Ch. 14 - Prob. 14.4KSP
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- What is the sign of the standard Gibbs free-energy change at low temperatures and at high temperatures for the explosive decomposition of TNT? Use your knowledge of TNT and the chemical equation, particularly the phases, to answer this question. (Thermodynamic data for TNT are not in Appendix G.) 2C7H5N3O6(s) 3N2(g) + 5H2O() + 7C(s) + 7CO(g)arrow_forwardConsider the reaction of 1 mol H2(g) at 25C 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 to generate work, what is the maximum useful work that can be obtained? How much entropy is produced in this case?arrow_forwardUse data from Appendix D to calculate the standardentropy change at 25°C for the reaction CH3COOH(g)+NH3(g)CH3NH2(g)+CO2(g)+H2(g) Suppose that 1.00 mol each of solid acetamide, CH3CONH2(s), and water, H2O(l), react to give thesame products. Will the standard entropy change belarger or smaller than that calculated for the reactionin part (a)?arrow_forward
- For each of the following processes, identify the systemand the surroundings. Identify those processes that arespontaneous. For each spontaneous process, identify theconstraint that has been removed to enable the process to occur: Ammonium nitrate dissolves in water. Hydrogen and oxygen explode in a closed bomb. A rubber band is rapidly extended by a hangingweight. The gas in a chamber is slowly compressed by aweighted piston. A glass shatters on the floor.arrow_forwardDefine the term entropy, and give an example of a sample of matter that has zero entropy. What are the units of entropy? How do they differ from the units of enthalpy?arrow_forwardWhat is meant by the standard free-energy change G for a reaction? What is meant by the standard free energy of formation Gf of a substance?arrow_forward
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- What is entropy? Why is entropy important?arrow_forwardThe molecular scale pictures below show snapshots of a strong acid at three different instants after it is added to water. Place the three pictures in the correct order so that they show the progress of the spontaneous process that takes place as the acid dissolves in the water. Explain your answer in terms of entropyarrow_forwardFor the decomposition of formic acid, HCOOH(l)H2O(l)+CO(g) H = +29 kJ/mol at 25C. a Does the tendency of this reaction to proceed to a state of minimum energy favor the formation of water and carbon monoxide or formic acid? Explain. b Does the tendency of this reaction to proceed to a state of maximum entropy favor the formation of products or reactants? Explainarrow_forward
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