The overall reaction and equilibrium constant value fora hydrogen−oxygen fuel cell at 298 K is
a. Calculate and
b. Predict the signs of
c. As temperature increases, does the maximumamount of work obtained from the fuel-cell reactionincrease, decrease, or remain the same? Explain.
Want to see the full answer?
Check out a sample textbook solutionChapter 11 Solutions
Chemical Principles
- Calculate G at 355 K for each of the reactions in Question 17. State whether the reactions are spontaneous.arrow_forwardThe overall reaction and equilibrium constant value for a hydrogen-oxygen fuel cell at 298 K is 2H2(g)+O2(g)2H2O(l)K=1.281083 a. Calculate and G at 298 K for the fuel cell reaction. b. Predict the signs of H and S for the fuel cell reaction. c. As temperature increases, does the maximum amount of work obtained from the fuel cell reaction increase, decrease, or remain the same? Explain.arrow_forwardThe standard potential, E, for the reaction of Zn(s) and Cl2(g) is +2.12 V. What is the standard free energy change, rG, for the reaction?arrow_forward
- Calculate E°, G°, and K at 25°C for the reaction 3Mn2+(aq)+2MnO4(aq)+2H2O5MnO2(s)+4H+(aq)arrow_forwardCalculate E°, G°, and K at 25°C for the reaction 3MnO4(aq)+4H+(aq)+Cl2(g)2Mn2+(aq)+2ClO3(aq)+2H2Oarrow_forwardCalculate G at 415 K for each of the reactions in Question 18. State whether the reactions are spontaneous.arrow_forward
- Calculate K at 25°C for each of the reactions referred to in Question 32. Assume smallest whole-number coefficients.arrow_forwardOne of the reactions that destroys ozone in the upper atmosphere is NO(g)+O3(g)NO2(g)+O2(g) Using data from Appendix 4, calculate G and K (at 298 K) for this reaction.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_forward
- The equilibrium constant for a reaction is 31015 (a) Without carrying out any calculation, discuss whether ?G° for the reaction is positive or negative. (b) Calculate ?G° for this reaction.arrow_forwardConsider the decomposition of red mercury(II) oxide under standard state conditions.. 2HgO(s,red)2Hg(l)+O2(g) (a) Is the decomposition spontaneous under standard state conditions? (b) Above what temperature does the reaction become spontaneous?arrow_forwardOn the basis of your experience, predict which of the following reactions are spontaneous. (a) CO2(s)CO2(g) at 25C (b) NaCl(s)NaCl(l) at 25C (c) 2NaCl(s)2Na(s)+Cl2(g)(d) CO2(g)C(s)+O2(g)arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning
- Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningChemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning