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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Imdadul Haque posted an Question
September 28, 2020 • 23:17 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
20°c, the standard emf of a certain c is +0.2699 v, and at 30°c it is +0.2669 hat can you say about the standard entropy of this reaction? assume that the stand
20°C, the standard EMF of a certain c is +0.2699 V, and at 30°C it is +0.2669 hat can you say about the standard entropy of this reaction? Assume that the standard AH° and AS° are ndependent or temperature: (a) AS =0 (b) AS+ve (C) A =-Ve (d) None of these.
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Priyanshu kumar Best Answer
option C delta S is negative Explanation:- As per temperature coefficient of cell, dS= nF[dE/dT] at constant pressure Here we can se that as temp. Increase E is decrease it means if we take T as positive then E will be negative. So, here [dE/dT] this ratio will be negative which is directly proportional to the entropy change. Hence, we can say that dS= (-ve)