Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IIGibb's Free EnergyMedium2 minQB
ChemistryMediumstatement
Statement 1: Vaporisation of water at 1 atm becomes spontaneous above 373 K.
Statement 2: The enthalpy of vaporisation of water is positive.
Options:
Answer:
B
Solution:
Δ Hvap>0 and Δ Svap>0, so Δ G=Δ H-TΔ S<0 when T>Δ H/Δ S=373 K: I correct. II is also correct, but a positive Δ H alone would make the process less favourable; the temperature dependence comes from the positive Δ S. Not the explanation. Answer (b).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Gibb's Free Energy
⏱ 2mℹ️ Source: QB
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