In an adibatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic conditions from the following :

Options

A. `q=0, Delta T ne 0, W =0`
B. `q ne 0, Delta T= 0, W= 0`
C. `q=0, Delta T = 0,W = 0`
D. `q=0, Delta T lt 0, W ne 0`

Answer

C

Explanation

Free expansion, W = 0 Adiabatic process q=0 `Delta U = q+W=0` this means that internal energy remains constant. Therefore, `Delta T =0` ideal gas there is no intermolecular attraction. Hence, when such a gas expands under adiabatic conditions into a vacuum, no heat is absorbed or evolved since no extemal work is done to separate the molecules.