Which is correct option for free expansion of an ideal gas under adiabatic condition-

Options

A. `q=0,DeltaT ne0,w=0`
B. `qne0,DeltaT=0,w=0`
C. `q=0,DeltaT=0,w=0`
D. `q=0,DeltaT lt 0,wne0`.

Answer

C

Explanation

For an adiabatic process,q=0, and for free expansion of a gas, w=0
`therefore DeltaU=q+w=0+0=0`.
For an ideal gas undergoing an isothermal process, `DeltaU=0`. So, the given process is isothermal and hence `DeltaT=0`.