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

(a) increased by 400 J

(b) increased by 200 J 

(c) increased by 100 J 

(d) decreased by 200 J

1 Answer

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Best answer

(a) increased by 400 J

∆U = ∆Q – ∆W = ∆Q – P∆V = 100 – 50 (4 – 10) = 400 J

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