1. Is the system’s entropy change positive or negative?

2. Water vapor deposits as ice crystals on a cold windowpane

3. A can of carbonated beverage loses its fizz (Consider the beverage but not the can as the system.)

4. A glassblower heats glass to its softening temperature

5. Water boils

6. A teaspoon of sugar dissolves in a cup of coffee. (The system consists of both sugar and coffee.)

7. Calcium carbonate precipitates out of water in a cave to form stalactites and stalagmites. (Consider only the calcium carbonate to be the system.)

8. Which one has a higher entropy? 1 or 2 Be able to explain why

9. Solid carbon dioxide at -78C Carbon dioxide vapor at 0C

10. Solid sugar Sugar dissolved in tea

11. 100mL of water and 100mL of alcohol 100mL of water and 100mL of alcohol mixed together

12. Cl 2 (g) P 4 (g)

13. NH 4 NO 3 (s) NH 4 NO 3 (aq)

14. AsH 3 (g) Kr(g)

15. CH 3 OH(l) C 2 H 5 OH(l)

16. Predict whether the entropy change would be positive or negative Be able to explain why

17. C 2 H 4 (g) + H 2 (g)  C 2 H 6 (g)

18. CH 3 OH(l)  CO(g) + 2H 2 (g)

19. Ag + (aq) + I - (aq)  AgI(s)

20. Br 2 (l) + H 2 (g)  2HBr(g)

21. CaCO 3 (s)  CaO(s) + CO 2 (g)