Chemistry · THERMODYNAMICS

Consider the formation of ammonia: \( \frac{1}{2}\text{N}_2(g) + \frac{3}{2}\text{H}_2(g) \rightarrow \text{NH}_3(g) \); \( \Delta_r H^\ominus = -46.1\text{ kJ mol}^{-1} \). What is the enthalpy change accompanying the complete decomposition of \( 68\text{ g} \) of gaseous ammonia into its constituent elements at the same conditions?

1. A
   \( -184.4\text{ kJ} \)
2. B
   \( +184.4\text{ kJ} \)
3. C
   \( +92.2\text{ kJ} \)
4. D
   \( -92.2\text{ kJ} \)