Section 16.5 Quiz
1) If Change in G is positive at all temperatures, then Change in S is ___________ and             Change in H is  __________.

2) Which of the following processes will lead to a decrease of the entropy in the system?

     a) N
2 (g) + 3H2 (g) ---> 2NH3 (g)
     b) H
2O (l) ---> H2O (g)
     c) CaCO
3 (s) ---> CaO (s?) + CO2 (g)
     d) NH
4NO3 (s) + H2O (l) ---> NH4 (aq) + NO3 (aq)

3) Calculate the Change in S* for the following reaction

      Hg (l) ---> Hg (g)

4) Does entropy increase or decrease in the following reaction?

      2NO (g) + O2 (g) ---> 2NO2 (g)

5) Predict the sign of Change in S* (system) for the following reaction

       NH
3 (g) ---> NH3 (aq)

Quiz Answers
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