The temperature at which the second virial coefficient of real gas is zero is called :

The temperature at which the second virial coefficient of a real gas is zero is called Boyle's temperature.It is the temperature at which a real gas obeys Boyle's law.It is given by the expression TB=abR​ where a and b are the van der Waal's constants.Boyle's temperature of a gas is always higher than its critical temperature.