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Q.

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

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a

with increase in temperature , the value of K  for exothermic reaction decreases because favourable change in entropy of the  surroundings decreases.

b

with increase in temperature , the value  of K for exothermic reaction decrease because the entropy change of the system is positive

c

with increase  in temperature , the value of K for endothermic reaction increases because the entropy change  of the system is negative

d

with increase in temperature, the value of K  for endothermic reaction increases  because unfavourable change  in entropy of the surroundings decreases

answer is A.

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Detailed Solution

For Exothermic Reaction, DH = -ve K decreases with raise in Temp(ΔS)sys=qT=ΔHT=ΔH=−ve So (ΔS)sys=−ve(ΔS)surr=−ve
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