Question

The work done, when a gas at p1, v1 changes to p2 and v2 adiabatically,

Answer 1

An ideal gas is expanded from (p1, V1, T1) to (p2, V2, T2) under different conditions. The correct statement(s) among the following is(are) 

(A) The work done on the gas is maximum when it is compressed irreversibly from (p2, V2) to (p1, V1) against constant pressure p1 

(B) If the expansion is carried out freely, it is simultaneously both isothermal as well as adiabatic 

(C) The work done by the gas is less when it is expanded reversibly from V1 to V2under adiabatic conditions as compared to that when expanded reversibly from V1 to V2 under isothermal conditions 

(D) The change in internal energy of the gas is (i) zero, if it is expanded reversibly with T1 = T2, and (ii) positive, if it is expanded reversibly under adiabatic conditions with T1 ≠ T2

Answer 2

Answer: B. Increases with increase in atomicity of gaseous molecules.

Explanation: