Chapter 18, Problem 31QP

Find the temperatures at which reactions with the following $\Delta H$ and $\Delta S$ values would become spontaneous: $\left(\text{a}\right)\Delta H\text{ = -126 kJ/mol, }\Delta S\text{ = 84 J/K }\cdot \text{ mol; }\left(\text{b}\right)\Delta H\text{ = -11}\text{.7 kJ/mol, }\Delta S\text{ = -105 J/K • mol}$.