JEE Advance - Chemistry (2017 - Paper 2 Offline - No. 14)
For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant $$K$$ in terms of change in entropy is described by
With increase in temperature, the value of $$K$$ for exothermic reaction decreases because the entropy change of the system is positive
With increase in temperature, the value of $$K.$$ for endothermic reaction increases because unfavorable change in entropy of the surroundings decreases
With increase in temperature, the value of $$K$$ for endothermic reaction increases because the entropy change of the system is negative
with increase in temperature, the value of $$K$$ for exothermic reaction decreases because favorable change in entropy of the surroundings decreases
Explanation
$$\Delta {S_{surr}} = - {{\Delta H} \over {{T_{surr}}}}$$
For endothermic, if Tsurr increases, unfavourable change in entropy of the surroundings decreases.
For exothermic, if Tsurr increases, favourable change in entropy of the surroundings decreases.
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