Chemistry - Thermodynamics - 1 Question with Solution | TestHub

ChemistryThermodynamics - 1Adiabatic Process/PolytropicEasy2 minPYQ_2020
ChemistryEasysingle choice

Two moles of an ideal gas is expanded isothermally and reversibly from 1 litre to 10 litre at 300 K. The enthalpy change (in kJ) for the process is

Options:

Answer:
C
Solution:

ΔH=ΔE+PV=ΔE+ΔRT=ΔE+RΔT

For isothermal expansion of ideal gas,ΔE=0

ΔE=CvΔT

SoΔH=0+0=0ΔT=0

puttingΔE=CvΔT,ΔH=CvΔT+RΔT=Cv+RΔT=CpΔTfor 1 mole

for n moles,ΔH=nCpΔT=0

Stream:NTA_ABHYASSubject:ChemistryTopic:Thermodynamics - 1Subtopic:Adiabatic Process/Polytropic
2mℹ️ Source: PYQ_2020

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