A free expansion of a gas results into no work. Explain.

In the free expansion of a gas, its internal energy

Write true or false of the following statements: No work is done during free expansion of an ideal gas under reversible or irreversible condition.

Assertion : Work done during free expansion of an ideal gas whether reversible or irreversible is positive. Reason : During free expansion, external pressure is always less than the pressure of the system.

Assertion : Work done during free expansion of an ideal gas whether reversible or irreversible is positive. Reason : During free expansion, external pressure is always less than the pressure of the system.

In isothermal free expansion of an ideal gas find the value of q and DeltaU.