A ΔG is negative.
B ΔH is positive and ΔS is positive.
C ΔH is positive and ΔS is negative.
D ΔH is negative and ΔS is negative.
E ΔH is negative and ΔS is positive.
A reaction must be nonspontaneous at all temperatures when?
2010-10-09 12:44 am
回答 (1)
2010-10-09 4:31 am
✔ 最佳答案
ΔG = ΔH – TΔS for the rxn to be thermodynamically allowed ΔG must be -ve. Turning it around for a rxn to be nonspontaneous ΔG must be +ve for all temps. This condition is only met in the case when ΔH is +ve AND -TΔS is +ve at all T, and the latter condition is met when ΔS is -ve. So the answer is C.
收錄日期: 2021-04-15 15:22:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101008164420AAJCEx2