Question

Vander waal's real gas, act as a ideal gas, at which conditions : -

Answer 1

Generally, a gas behaves more like an ideal gas at higher temperature and lower pressure, as the potential energy due to intermolecular forces becomes less significant compared with the particles' kinetic energy, and the size of the molecules becomes less significant compared to the empty space between them.

Answer 2

Another condition is that there are not any significant interactions between gas molecules. At high temperature, kinetic energy of molecules of gas is higher and therefore intermolecular forces are less significant. For gas to behave in ideal way, intermolecular forces should tend to zero