Question 28

The standard molar entropies of $$\text{H}_2(g)$$, $$\text{N}_2(g)$$ and $$\text{NH}_3(g)$$ are 130, 190 and $$193\ \text{J mol}^{-1}\text{K}^{-1}$$ respectively. For the reaction $$\frac{1}{2}\text{N}_2(g) + \frac{3}{2}\text{H}_2(g) \rightleftharpoons \text{NH}_3(g)$$ with $$\Delta H_{reaction} = -45\ \text{kJ}$$ to be in equilibrium, the temperature must be equal to

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