InterviewSolution
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InterviewSolution
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For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant Kin terms of change in entropy is described byA. With increase in temperature, the value of K for exothermic reaction decreases because the entropy change of the system is positive.B. With increase in temperature, the value of K for endothemic reaction increases because unfavourable change in entropy of the surrounding decreasesC. With increases in temperature, the value of K for exothermic reaction decreases because because favourable change in entropy of the surroundings decreasesD. With increases in temperature, the value of K for endothemic reaction increases because the entropy change of the system negative. |
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Answer» Correct Answer - B::C For endothermic reactions: `DeltaH=+ve` therefore, equilibrium constant increases with temperature. `log((K_(1))/(K_(2)))=(DeltaH)/(2.303R)[(1)/(T_(1))-(1)/(T_(2))]` `DeltaS_(surr)=-(q_("system"))/(T)` `DeltaS_(surr) lt `0 for endothermic process thus decrease in entropy of surroudings is unfavourable. For exothermic reaction, equilibrium constant will decreases with rise in temperature `DeltaS_(surr) lt0` (for exothermic process which is favourable for surroundings). |
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