6
Question
Three moles of an ideal gas expands reversibly under isothermal condition from 2 L to 20 L at 300 K. The amount of heat-change (in kJ/mol) in the process is:
Three moles of an ideal gas expands reversibly under isothermal condition from 2 L to 20 L at 300 K. The amount of heat-change (in kJ/mol) in the process is:
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Solution
The correct option is D 17.2
ΔU=q+w
Work done in an isothermal reversible process is:
w=−nRT lnV2V1=−3×8.314×300 ln202=−17232.4 J
As the process of isothermal ΔU=0
q=−w=+17.2 kJ
Hence, option D is correct.
ΔU=q+w
Work done in an isothermal reversible process is:
w=−nRT lnV2V1=−3×8.314×300 ln202=−17232.4 J
As the process of isothermal ΔU=0
q=−w=+17.2 kJ
Hence, option D is correct.
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