Question

In an adiabatic process ,no transfer of heat takes place between system and surroundings.Choose the correct option for free expansion of and ideal gas under adiabatic condition from the following `:`
A. `q=0 , Delta cancel(=) 0,w=0`
B. `q cancel(=) 0, DeltaT =0,w=0`
C. `q =0,DeltaT=0, w=0`
D. `q=0,DeltaT=0,w cancel (=) 0`

Answer 1

Correct Answer - c
For free expansion , `P_(ext) = 0,w = - P _(ext) DeltaV=0`
For adiabatic process , `q=0`
`:. DeltaU =q+w= 0`. This means that internal energy remains constant which is so at constant temperature. Hence `DeltaT =0`