Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IIGibb's Free EnergyMedium2 minQB
ChemistryMediumstatement
Statement 1: An exothermic process, non-spontaneous at high temperature, may become spontaneous at low temperature.
Statement 2: With decrease in temperature, randomness (entropy) decreases.
Options:
Answer:
A
Solution:
With Δ H<0, Δ S<0, Δ G=Δ H-TΔ S=Δ H+T|Δ S| is positive at high T and negative at low T: I correct. Lowering T lowers the entropy of the system and so reduces the unfavourable T|Δ S| term. II is correct and explains I. Answer (a).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Gibb's Free Energy
⏱ 2mℹ️ Source: QB
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