Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 55QAP
Calculate ΔG° at 25°C for each of the reactions referred to in Question 29. Assume smallest whole-number coefficients.
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The reaction of calcium oxide with the pollutant sulfur trioxide, CaO(s) + SO3(g) → CaSO4(s); ΔG° = –345 kJ/mol, has been proposed as one way of removing SO3 from the smoke resulting from burning coal that contains sulfur. This reaction hardly occurs under standard state conditions. Calculate ΔG for this reaction at 25 °C when the pressure of SO3 is 0.10 atm.
AS 0.
An endothermic reaction is carried out under standard conditions. The equilibrium constant, Keq, for the reaction at 298 K is
Keq = 3.55 x 107. Which of the following is true about the sign of AGº for the reaction?
AG°> 0 because Keq is much greater than 1.
The standard reaction free energy AG°=-–457. kJ for this reaction:
2 H,(g) + O2(g)→2 H,O(g)
Use this information to complete the table below. Round each of your answers to the nearest kJ.
AG
reaction
x10
2H,0 (g) -
2H, (g) + 0,(g)
kJ
4H, (g) + 20, (g) → 4H,0(g)
kJ
8H,0 (g) → 8H, (8) + 40, (g)
kJ
Chapter 17 Solutions
Chemistry: Principles and Reactions
Ch. 17 - Balance the following half-equations. Balance (a)...Ch. 17 - Balance the following half-equations. Balance (a)...Ch. 17 - Prob. 3QAPCh. 17 - Balance the following reactions in acid: (a)...Ch. 17 - Write balanced equations for the following...Ch. 17 - Write balanced equations for the following...Ch. 17 - Prob. 7QAPCh. 17 - Write balanced net ionic equations for the...Ch. 17 - Write balanced net ionic equations for the...Ch. 17 - Prob. 10QAP
Ch. 17 - Write a balanced chemical equation for the overall...Ch. 17 - Write a balanced net ionic equation for the...Ch. 17 - Draw a diagram for a salt bridge cell for each of...Ch. 17 - Follow the directions in Question 13 for the...Ch. 17 - Consider a voltaic salt bridge cell represented by...Ch. 17 - Consider a salt bridge voltaic cell represented by...Ch. 17 - Consider a salt bridge cell in which the anode is...Ch. 17 - Follow the directions in Question 17 for a salt...Ch. 17 - Prob. 19QAPCh. 17 - Which species in each pair is the stronger...Ch. 17 - Using Table 17.1, arrange the following reducing...Ch. 17 - Use Table 17.1 to arrange the following oxidizing...Ch. 17 - Consider the following species. Cr3+ Hg(l) H2...Ch. 17 - Follow the directions of Question 23 for the...Ch. 17 - For the following half-reactions, answer these...Ch. 17 - For the following half-reactions, answer the...Ch. 17 - Use Table 17.1 to select (a) a reducing agent in...Ch. 17 - Use Table 17.1 to select (a) an oxidizing agent in...Ch. 17 - Calculate E° for the following voltaic cells: (a)...Ch. 17 - Calculate E° for the following voltaic cells: (a)...Ch. 17 - Using Table 17.1, calculate E° for the reaction...Ch. 17 - Using Table 17.1, calculate E° for the reaction...Ch. 17 - Calculate E° for the following cells: (a)...Ch. 17 - Calculate E° for the following cells: (a)...Ch. 17 - Suppose Ered for Ag+Ag were set equal to zero...Ch. 17 - Suppose Ered for H+H2 were taken to be 0.300 V...Ch. 17 - Which of the following reactions is/are...Ch. 17 - Which of the following reactions is(are)...Ch. 17 - Use the following half-equations to write three...Ch. 17 - Follow the directions of Question 39 for the...Ch. 17 - Use Table 17.1 to answer the following questions:...Ch. 17 - Use Table 17.1 to answer the following questions....Ch. 17 - Write the equation for the reaction, if any, that...Ch. 17 - Write the equation for the reaction, if any, that...Ch. 17 - Prob. 45QAPCh. 17 - Prob. 46QAPCh. 17 - Use Table 17.1 to predict what reaction, if any,...Ch. 17 - Use Table 17.1 to predict what reaction, if any,...Ch. 17 - Consider a cell reaction at 25°C where n=2 . Fill...Ch. 17 - Consider a cell reaction at 25°C where n=4 . Fill...Ch. 17 - For a certain cell, G=25.0 kJ. Calculate E° if n...Ch. 17 - For a certain cell, E=1.08 V. Calculate G° if n is...Ch. 17 - Calculate E°, G°, and K at 25°C for the reaction...Ch. 17 - Calculate E°, G°, and K at 25°C for the reaction...Ch. 17 - Calculate G° at 25°C for each of the reactions...Ch. 17 - Calculate G° at 25°C for each of the reactions...Ch. 17 - Calculate K at 25°C for each of the reactions...Ch. 17 - Calculate K at 25°C for each of the reactions...Ch. 17 - Prob. 59QAPCh. 17 - Use Table 17.1 to find Kffor AuCl4- (aq) at 25°C.Ch. 17 - Prob. 61QAPCh. 17 - What is E° at 25°C for the following reaction?...Ch. 17 - Consider a voltaic cell at 25°C in which the...Ch. 17 - Consider a voltaic cell at 25°C in which the...Ch. 17 - Consider a voltaic cell in which the following...Ch. 17 - Consider a voltaic cell in which the following...Ch. 17 - Calculate the voltages of the following cells at...Ch. 17 - Calculate the voltages of the following cells at...Ch. 17 - Consider the reaction...Ch. 17 - Consider the reaction at 25°C:...Ch. 17 - Complete the following cell notation....Ch. 17 - Complete the following cell notation....Ch. 17 - Consider the reaction below at 25°C:...Ch. 17 - Consider the reaction low at 25°C:...Ch. 17 - Consider a cell in which the reaction is...Ch. 17 - Consider a cell in which the reaction is...Ch. 17 - An electrolytic cell produces aluminum from Al2O3...Ch. 17 - Prob. 78QAPCh. 17 - A solution containing a metal ion (M2+(aq)) is...Ch. 17 - A solution containing a metal ion (M2+(aq)) is...Ch. 17 - A baby's spoon with an area of 6.25 cm2 is plated...Ch. 17 - A metallurgist wants to gold-plate an object with...Ch. 17 - A lead storage battery delivers a current of 6.00...Ch. 17 - Calcium metal can be obtained by the direct...Ch. 17 - Given the following data:...Ch. 17 - In a nickel-cadmium battery (Nicad), cadmium is...Ch. 17 - Hydrogen gas is produced when water is...Ch. 17 - Consider the electrolysis of NiCl2 to Ni(s) and...Ch. 17 - An electrolysis experiment is performed to...Ch. 17 - Prob. 90QAPCh. 17 - Prob. 91QAPCh. 17 - Prob. 92QAPCh. 17 - Atomic masses can be determined by electrolysis....Ch. 17 - Consider the following reaction at 25°C:...Ch. 17 - Given the standard reduction potential for...Ch. 17 - Choose the figure that best represents the results...Ch. 17 - For the cell: Cr|Cr3+Co2+|Co E° is 0.46 V. The...Ch. 17 - Which of the changes below will increase the...Ch. 17 - The standard potential for the reduction of AgSCN...Ch. 17 - Consider the following standard reduction...Ch. 17 - Use Table 17.1 to answer the following questions....Ch. 17 - Consider three metals, X, Y, and Z, and their...Ch. 17 - An alloy made up of tin and copper is prepared by...Ch. 17 - In a fully charged lead storage battery, the...Ch. 17 - Consider a voltaic cell in which the following...Ch. 17 - In biological systems, acetate ion is converted to...Ch. 17 - Consider the cell Pt|H2|H+H+|H2|Pt In the anode...Ch. 17 - Prob. 108QAPCh. 17 - Prob. 109QAP
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- Calculate G and K at 25C for the reactions in Exercises 38 and 42.arrow_forwardConsider the equilibrium system HF(aq)H+(aq)+F(aq) Given HfHF(aq)=320.1kJ/mol , HfF(aq)=332.6kJ/mol ; SF(aq)=13.8kJ/molK ; KaHF=6.9104 at 25°C calculate S° for HF(aq).arrow_forwardCalculate G at 355 K for each of the reactions in Question 17. State whether the reactions are spontaneous.arrow_forward
- How is the pH scale defined? What range of pH values corresponds to acidic solutions? What range corresponds to basic solutions? Why is pH = 7.00 considered neutral? When the pH of a solution changes by one unit, by what factor does the hydrogen ion concentration change in the solution? How is pOH defined? How arc pH and pOH for a given solution related? Explain.arrow_forwarda Calculate K1, at 25C for phosphoric acid: H3PO4(aq)H+(aq)+H2PO4(aq) b Which thermodynamic factor is the most significant in accounting for the fact that phosphoric acid is a weak acid? Why ?arrow_forwardUse the values for G f in Appendix 1 to calculate Ksp for barium sulfate at 25C. Compare with the value given in Chapter 15.arrow_forward
- The following reaction occurs in pure water: H2O(l)+H2O(l)H3O+(aq)+OH-(aq) which is often abbreviated as H2O(l)H+(aq)+OH-(aq) For this reaction, G = 79.9 kJ/mol at 25C. Calculate the value of G for this reaction at 25C when [OH] = 0.15 M and [H+] = 0.71 M.arrow_forward5.11. Determine the numerical value of Q for the reaction conditions indicated.arrow_forwardCalculate G° at 25°C for each of the reactions referred to in Question 30. Assume smallest whole-number coefficients.arrow_forward
- Estimate ΔrG° at 2000. K for each reaction in Question 60.arrow_forwardDescribe a nonchemical system that is not in equilibrium, and explain why equilibrium has not been achieved.arrow_forwardCalculate G for the following reactions and state whether each reaction is spontaneous under standard conditions at 298 K. (a) 2Na(s) + H2SO4() Na2SO4(s) + H2(g) (b) Cu(s) + H2SO4() CuSO4(s) + H2(g)arrow_forward
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