Question

In the following reversible reaction,
$2S{O}_2+O_2\to 2S{O}_3\Delta H=-Qcal$
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

Exothermic reactions are favoured at low temperatures in forward direction. If we apply high pressure, reaction will tend to move in that direction where pressure is low (less number of gaseous molecules) according to Le-chatelier’s principle.