Twp cylinders of equal size are filled with equal amount of ideal diatomic gas at room temperature. Both the cylinders are fitted with pistons. In cylinder A the piston is free to move, while in cylinder B the piston is fixed. When same amount of heat is added to cylinder A raises by 20 K. What will be the rise temperature of gas in cylinder B?
A. 28K
B. 20K
C. 15K
D. 10K
I had been asked this question during an interview.
My question is based upon Isothermic and Adiabatic Process in portion Kinetic Theory of Gases of Engineering Physics I
The correct answer is A. 28K
To elaborate: For gas in cylinder A, Q = nCp ∆T1
For gas in cylinder B, Q = nCv ∆T2
∆T2=Cp/Cv ∆T1=7/5×20=28K.