Thermodynamics Question 176

Question: A gas is compressed at a constant pressure of 50N/m2 from a volume of 10m3 to a volume of 4m3 . Energy of 100 J then added to the gas by heating. Its internal energy is

[MNR 1994]

Options:

A) Increased by 400 J

B) Increased by 200 J

C) Increased by 100 J

D) Decreased by 200 J

Show Answer

Answer:

Correct Answer: A

Solution:

From FLOT ΔQ=ΔU+ΔW

=ΔU+PΔV

 100=ΔU+50×(410)ΔU=400 J



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