Question

Which of the following conditions will favour the maximum formation of the product in the reaction:
$A_2$(g) + $B_2$(g) $\rightleftharpoons$ $X_2$(g) ${△}_r$H= -X kJ

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

Answer 1

The correct option is C Low temperature and high pressure

On increasing the pressure, the equilibrium shifts in a direction where there are fewer moles of the gas i.e. in forward direction.
Since this is an exothermic reaction, on decreasing the temperature, the equilibrium constant value increases. This is made possible by forming more products i.e., forward direction.