Chemistry - Thermodynamics - I Question with Solution | TestHub
ChemistryThermodynamics - IAdiabatic Process/PolytropicMedium2 minQB
ChemistryMediummultiple choice
An amount of 4 moles of an ideal monoatomic gas expands adiabatically and reversibly by which its temperature decreases from 47°C to 17°C. Which of the following is/are true?
Options:(select one or more)
Answer:
A, C
Solution:
Adiabatic: q = 0. Δ T = -30 K. With R = 2 cal/K-mol, Cp = 5R/2 = 5 cal/K-mol, so Δ H = nCpΔ T = 4 × 5 × (-30) = -600 cal. Cv = 3 cal/K-mol, so Δ U = 4 × 3 × (-30) = -360 cal, not -600. Ans: (a), (c).
Stream:JEESubject:ChemistryTopic:Thermodynamics - ISubtopic:Adiabatic Process/Polytropic
⏱ 2mℹ️ Source: QB
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