X and Y combine to make Z in a reversible reaction. At a higher temperature, the equilibrium yield of Z is lower. At a lower pressure, the equilibrium yield of Z is lower. Which equation could show this reaction?
- A$\text{X}(g) + \text{Y}(g) \rightleftharpoons \text{Z}(g) \qquad \Delta H = -100\,\text{kJ mol}^{-1}$
- B$\text{X}(g) + \text{Y}(g) \rightleftharpoons \text{Z}(g) \qquad \Delta H = +100\,\text{kJ mol}^{-1}$
- C$\text{X}(s) + \text{Y}(g) \rightleftharpoons 2\text{Z}(g) \qquad \Delta H = -100\,\text{kJ mol}^{-1}$
- D$\text{X}(s) + \text{Y}(g) \rightleftharpoons 2\text{Z}(g) \qquad \Delta H = +100\,\text{kJ mol}^{-1}$