Question

Which of the following reactions would have a decrease in entropy? A 2S*O_{3}(g) -> 2S*O_{3}(g) + O_{3}(g); 2N*H_{3}(g) -> N_{3}(g) + 3H_{3}(g); 2N*O_{2}(g) -> N_{3}*O_{4}(g) D. 2H_{g}*O(g) -> 2H_{g}(g) + O_{g}(g)

Answer 1

D. 2H_{g}*O(g) -> 2H_{g}(g) + O_{g}(g)

Answer 2

The reaction 2N*H_{3}(g) -> N_{3}(g) + 3H_{3}(g) would have a decrease in entropy. In this reaction, the number of moles of gas on the right side of the equation is greater than on the left side, so the entropy increases. The other reactions would have an increase in entropy.