A. 0.39 °C B. 390 °C C. 279 °C D. 663 °C E. 117 °C
14. The following reaction takes place at 120°C: H2O(l) → H2O(g) ΔH = 44.0 kJ/mol ΔS = 0.119 kJ/mol K
Which of the following must be true?
A. ΔG < 0 B. The reaction is not spontaneous. C. ΔG = 0 D. The reaction is spontaneous. E. Two of these choices are correct.
15. The third law of thermodynamics states:A.The entropy is zero at 0 K for a perfect crystal.
B.The entropy of the universe equals the sum of the entropy of system and surroundings.
C.The absolute entropy of a substance decreases with increasing temperature.
D.The entropy of the universe is increasing.
E.The entropy of the universe is constant.