5J.15 Calculate the equilibrium constant at 25 8C and at 150 8C for each of the following reactions, using data available in Appendix 2A.
(a) NH4Cl(s) <--> NH3(g) + HCl(g)
(b) H2(g) + D2O(l) <--> D2(g) + H2O(l)
For these problems, why do you have to use ∆Hº and ∆Sº instead of directly using ∆G?