Thermodynamics Question 138

Question: When heat energy of 1500 Joules, is supplied to a gas at constant pressure 2.1×105N/m2 , there was an increase in its volume equal to 2.5×10−3m3 . The increase in internal energy of the gas in Joules is

[EAMCET (Engg.) 1999]

Options:

A) 450

B) 525

C) 975

D) 2025

Show Answer

Answer:

Correct Answer: C

Solution:

According to FLOT ΔQ=ΔU+P(ΔV)

Therefore ΔU=ΔQ−P(ΔV)

=1500−(2.1×105)(2.5×10−3) =975 Joule

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