A real gas deviates from ideal behavior due to intermolecular forces and the finite size of molecules. At high temperatures, kinetic energy dominates and intermolecular forces become negligible. At low pressures, molecules are far apart, reducing interactions. Under these conditions, the gas behaves nearly like an ideal gas.
A gas is said to behave like an ideal gas when relation PV/T= Constant. When do you expect a real gas to behave like ideal gas?
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