Chemistry 9701 · AS & A Level · Equilibria

Equilibria — practice question

For which equilibrium reaction is the equilibrium position shifted to the right when the temperature is raised and the pressure is lowered?

  • A$\text{H}_2(g) + \text{CO}_2(g) \rightleftharpoons \text{H}_2\text{O}(g) + \text{CO}(g) \qquad \Delta H = 40\,\text{kJ mol}^{-1}$
  • B$\text{N}_2\text{O}_4(g) \rightleftharpoons 2\text{NO}_2(g) \qquad \Delta H = 58\,\text{kJ mol}^{-1}$
  • C$2\text{SO}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{SO}_3(g) \qquad \Delta H = -197\,\text{kJ mol}^{-1}$
  • D$2\text{HI}(g) \rightleftharpoons \text{H}_2(g) + \text{I}_2(g) \qquad \Delta H = -10\,\text{kJ mol}^{-1}$

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