The reaction of sulfur dioxide with oxygen is reversible. $2\text{SO}_2 + \text{O}_2 \rightleftharpoons 2\text{SO}_3 \qquad \Delta H^{\circ} = -196\,\text{kJ mol}^{-1}$. At what pressure and temperature would the reaction to the left be preferred?
- Ahigh pressure, high temperature
- Bhigh pressure, low temperature
- Clow pressure, high temperature
- Dlow pressure, low temperature