In an equilibrium reaction, hydrogen gas and iodine gas combine to produce hydrogen iodide gas. $\text{H}_2(\text{g}) + \text{I}_2(\text{g}) \rightleftharpoons 2\text{HI}(\text{g}) \qquad \Delta H = +26.5\,\text{kJ mol}^{-1}$ Which changes would increase the equilibrium yield of HI?
- A1 and 3
- B1 and 4
- C2 and 3
- D2 and 4