Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IIGibb's Free EnergyMedium2 minQB
ChemistryMediummultiple choice
Which of the following processes are expected to be non-spontaneous at low temperature and spontaneous at high temperature?
Options:(select one or more)
Answer:
C, D
Solution:
The pattern needs Δ H > 0 and Δ S > 0, so Δ G = Δ H - TΔ S turns negative only at high T. N2O4 dissociation (1 to 2 mol gas, bond breaking) and CaCO3 decomposition (gas released, endothermic) both fit. Water formation and condensation are exothermic with Δ S < 0, spontaneous at low T. Ans: (c), (d).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Gibb's Free Energy
⏱ 2mℹ️ Source: QB
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