Chemistry 9701 · AS & A Level · Equilibria

Equilibria — practice question

Methanol, $\text{CH}_3\text{OH}$, is produced industrially from carbon monoxide and hydrogen in the equilibrium reaction below: $\text{CO}(g) + 2\text{H}_2(g) \rightleftharpoons \text{CH}_3\text{OH}(g)$, $\Delta H = -100\,\text{kJ mol}^{-1}$. Which statement about this equilibrium is correct?

  • A$K_p$ for the process is $\dfrac{p_{\text{CH}_3\text{OH}}}{p_{\text{CO}} \times p_{\text{H}_2}}$.
  • BAn increase in pressure increases the equilibrium yield of methanol.
  • CAn increase in temperature increases the equilibrium yield of methanol.
  • DThe addition of an effective catalyst increases the equilibrium yield of methanol.

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