Question

In the following reversible reaction $2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)\Delta H=-QCal$, where Q is positive. Most suitable condition for the higher production of $S{O}_3$ is

• A. High temperature and high pressure
• B. High temperature and low pressure
• C. Low temperature and high pressure
• D. Low temperature and low pressure

Answer 1

The correct option is C Low temperature and high pressure

As the $\Delta H$ is negative, reaction is exothermic so there should be low temperature for reaction to proceed. From left to right as no. of moles are decresing so according to Le Chatelier's principle at high pressure reaction will proceed in forward direction.
Hence, for reaction to proceed in forward direction there should be low temperature and high pressure.