Chapter 23 Text Review Questions

1. Chapter 23 Text Review Questions Answers

2. CH 23 TEXT #1-26 KEY • 1.B 9. POSITIVE • 2.B 10. ENTROPY & ENTHALPY • 3.A 11. TRUE • 4.C 12 IS NONSPONTANEOUS • 5.A 13. ΔH • 6.C 14. TEMPERATURE • 7.A 15 Keq << 1 • 8.C 16.LESS

3. Ch Review Questions • 17. A spontaneous rxn is one that proceeds on its own without outside intervention • 18. Quantitative measure of disorder of substances involved in a reaction. Solids changing to liquids and combustion of fuels.

4. ΔG = ΔH - T ΔS #19. - ΔH / +ΔSALWAYS be spontaneous! +ΔH / + ΔSSpontaneous at HIGH Temperatures + ΔH / – ΔSALWAYS NONSPONTANEOUS. -ΔH / -ΔSSpontaneous at LOW Temperatures

5. Ch Review Questions • 20. Free energy incorporates both entropy and enthalpy. It determines a reaction’s spontaneity. Spontaneous rxns have negative free energy values • 21. ΔG = ΔH - T ΔSAt high temps the T ΔSterm will cause ΔG to be negative. The driving force is only entropy. Entropy increases as temp increases.

6. Ch Review Questions • 22. a) + b) - c) + • 23. • a) + ; depends on values of S,H, and T • b) +; spontaneous • c) +; spontaneous • 24. OMIT

7. Ch Review Questions • 25. a) - b) - c) - • 26. a) + b) - c) – • END CHAPTER REVIEW QUESTIONS