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kundan

· started a discussion

· 1 Months ago

wrong solution (Question: 298785.0 )

compression is work done on system hence it is negative

Question:

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

Options:
A)

Increased by 400 J

B)

Increased by 200 J

C)

Increased by 100 J

D)

Decreased by 200 J

Solution:

Ans: (a) By flot ∆Q = ∆W + dU

100J = 50 (4 – 10) + dU ⇒ dU = 400 J

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