Chemistry - Thermodynamics - II Question with Solution | TestHub
ChemistryThermodynamics - IICalculation of DSMedium2 minQB
ChemistryMediumsingle choice
A sample of ideal gas initially occupies 20.0 L at 400 K and 2.0 bar and is compressed isothermally. To what volume must it be compressed to reduce its entropy by 5.0 J/K? [ln 0.6 = -0.5]
Options:
Answer:
B
Solution:
nR = PV/T = (2.0 × 20.0)/400 = 0.10 bar-L/K = 10 J/K. Δ S = nRln(V2/V1) = -5.0 gives ln(V2/V1) = -0.5 = ln 0.6. V2 = 0.6 × 20.0 = 12 L. Matches (b).
Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Calculation of DS
⏱ 2mℹ️ Source: QB
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