Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IIGibb's Free EnergyMedium2 minQB
ChemistryMediummultiple choice
Which of the following processes are expected to be spontaneous at low temperature and non-spontaneous at high temperature?
Options:(select one or more)
Answer:
B, C, D
Solution:
The pattern needs Δ H < 0 and Δ S < 0 so Δ G = Δ H - TΔ S is negative only at low T. PCl5 dissociation has Δ H > 0, Δ S > 0 (spontaneous at high T). Forming water from the gases lowers gas moles (Δ S < 0) and is exothermic. Freezing is exothermic with Δ S < 0. Ans: (b), (c), (d).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Gibb's Free Energy
⏱ 2mℹ️ Source: QB
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