Chemistry - Complete Pblock- Question with Solution | TestHub

The reaction $2S{O}_2(g)+O_2(g)\rightleftharpoons 2S{O}_3(g)$ is exothermic ($\Delta H^{\circ }=-198KJ$). According to Le Chatelier's principle, a low temperature favors exothermic reactions, shifting the equilibrium towards products. Also, the reaction involves a decrease in the number of gas moles (3 moles on reactants side to 2 moles on products side). Therefore, high pressure favors the formation of products. Thus, low temperature and high pressure are favorable.