Chapter 18, Problem 18.120SP

Ammonium nitrate is dangerous because it decomposes RAN (sometimes explosively) when heated:

   ${\text{NH}}_{\text{4}}{\text{NO}}_{\text{3}}(s)\to {\text{N}}_{\text{2}}{\text{O(g)+2H}}_{\text{2}}\text{O(g)}$

(a) Using the data in Appendix B show that this reaction is spontaneous at 25 °C.
(b) How does $\Delta G^o$ for the reaction change when the ternp erature is raised?
(c) Calculate the equilibrium constant at 25 °C.
(d) Calculate $\Delta G$ for the reaction when the partial pressure of each gas is 30 atm.