Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IICalculation of DSMedium2 minQB
ChemistryMediumsingle choice
A sample of perfect gas that initially occupies 15.0 L at 300 K and 1.0 bar is compressed isothermally. To what volume must the gas be compressed to reduce its entropy by 5.0 J/K? [ln 0.36 = -1.0, ln 2.7 = 1.0]
Options:
Answer:
A
Solution:
nR = P1V1/T = (1.0 × 15.0 bar-L)/300 K = 0.05 bar-L/K = 5.0 J/K. Δ S = nRln(V2/V1) = -5.0 gives ln(V2/V1) = -1.0 = ln 0.36. V2 = 0.36 × 15.0 = 5.4 L. Matches (a).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Calculation of DS
⏱ 2mℹ️ Source: QB
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