Question

The reaction $2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)$,$\Delta H=-XkJ$ is favoured by high pressure and high temperature.

• A. True
• B. False

Answer 1

The correct option is B False

The reaction $2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)$,$\Delta H=-XkJ$ is favored by high pressure and low temperature.
The reaction proceeds with decrease in the number of moles of gaseous species. When pressure is increased, the reaction will shift in forward direction so that the number of moles of gaseous species decrease. This will nullify the effect of increased pressure. Hence, the reaction is favored by high pressure. The enthalpy change for the reaction is negative. Hence, the reaction is exothermic. Such reactions are favored at low temperature. When the temperature is low, the reaction will shift in the forward direction so that heat is evolved which will nullify the effect of low temperature.