Q. If a gas has 2 atm and 5 atm pressure at $30℃$ and $27℃$ respectively. Then it will
A) Cool on expansion
B) Warm on expansion
C) No change on expansion
D) None of these
Explanation
(b)
Joule-Thomson coefficient
$\mu = \frac{dT}{dP} = \frac{27 - 30}{5 - 2} = - 1$
For all negative values of $\mu$,the gas warms on expansion
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.