Chapter 18.6, Problem 3CP

The $\Delta$ G° for the reaction:

${\text{N}}_2(g){\text{ + 3H}}_{\text{2}}\text{(g) }\rightleftarrows {\text{ 2NH}}_{\text{3}}\text{(}g\text{)}$

is $\text{-33}\text{.3 kJ/mol}$ at $\text{25°C}$. What is the value of $K_P$ ?

$\begin{array}{l}\text{a)}\\ 2\times {10}^{-6}\\ \text{b)}\\ 7\times {10}^5\\ \text{c)}\\ 3\times {10}^{-70}\\ \text{d})\\ 1\\ \text{e})\\ 1\times {10}^{-1}\end{array}$