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Question: Answered & Verified by Expert
If a chemical reaction is known to be non-spontaneous at 298 K but spontaneous at 350 K, then which among the following conditions is true for the reaction?
ChemistryThermodynamics (C)AP EAMCETAP EAMCET 2021 (19 Aug Shift 1)
Options:
  • A ΔG=ve,ΔH=ve,ΔS=+ve
  • B ΔG=+ve,ΔH=+ve,ΔS=+ve
  • C ΔG=ve,ΔH=+ve,ΔS=+ve
  • D ΔG=+ve,ΔH=+ve,ΔS=ve
Solution:
1745 Upvotes Verified Answer
The correct answer is: ΔG=ve,ΔH=+ve,ΔS=+ve

So according to the question we have to find the non spontaneous process then

We know the second law of thermodynamics

G = H -TS

So we know that for spontaneous

G<0

So for that we have the condition which is 

ΔG=ve,ΔH=+ve,ΔS=+ve

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