Question

Given the chemical equilibrium, $A\rightleftharpoons B+C,$ where $\Delta H_{rxn}$ is negative, what effect increasing the temperature (at constant pressure ) would have on the system at equilibrium?

• A. No change
• B. Shift to the left
• C. Shift to the right
• D. Shift to the left for $K<1$ and to the right for $K>1$

Answer 1

The correct option is B Shift to the left

Given reaction is :-

$A\to B+C;△H<0$

Here, forward reaction is exothermic. So, if temperature is increased then as per Le Chatelier's principle, the equilibrium shifts to left side (backward direction).