The thermodynamic process,in which the internal energy of the system remains constant is ...........

One mole of ${O_2}$ gas having a volume equal to $22.4 \text{ litres}$ at $0^{\circ}C$ and $1 \text{ atmospheric pressure}$ is compressed isothermally so that its volume reduces to $11.2 \text{ litres}$. The work done in this process is ...... $J$.

Work done by a system under isothermal change from a volume $V_1$ to $V_2$ for a gas which obeys Van der Waals' equation $(V - n\beta) \left( P + \frac{\alpha n^2}{V^2} \right) = nRT$.

Obtain an expression for work done by an ideal gas in an isothermal expansion.

$A$ gas is compressed at constant temperature. Its molecules gain:

Can the change in internal energy of an ideal gas be non-zero during an isothermal process?