Chemical Thermodynamics Question 46

Question: The work done to contract a gas in a cylinder, is 462 joules. 128 joule energy is evolved in the process. What will be the internal energy change in the process [MP PMT 2003]

Options:

A) + 590 joules

B) - 334 joules

C) + 334 joules

D) - 590 joules

Show Answer

Answer:

Correct Answer: C

Solution:

As the work is done on system, it will be positive i.e. $ W=+462,joule,,E=-128,joule $ (heat is evolving) From the Ist law of thermodynamics $ \Delta E=q+w=(-128)+(+462)=+334,Joules. $



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