Thermodynamics Question 226

Question: In a given process on an ideal gas, dW=0 and dQ<0. Then for the gas

Options:

A) the temperature will decrease

B) the volume will increase

C) the pressure will remain constant

D) the temperature will increase

Show Answer

Answer:

Correct Answer: A

Solution:

[a] From the first law of thermodynamics

dQ=dU+dW Here dW=0 (given)  dQ=dU

Now since dQ<0 (given)

dQ is negative

dU=vedU decreases.

Temperature decreases.



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