Which combination of conditions produces the greatest equilibrium yield of ammonia? $\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g)$ $\Delta H^\circ = -92\,\text{kJ mol}^{-1}$
- Acatalyst absent, pressure high, temperature low
- Bcatalyst absent, pressure low, temperature high
- Ccatalyst present, pressure high, temperature high
- Dcatalyst present, pressure low, temperature low