Boyle temperature
The Boyle temperature, named after Robert Boyle, is formally defined as the temperature for which the second virial coefficient, B 2 ( T ) {\displaystyle B_{2}(T)} , becomes zero. It is at this temperature that the attractive forces and the repulsive forces acting on the gas particles balance out P = R T ( 1 V m + B 2 ( T ) V m 2 + ⋯ ) {\displaystyle P=RT\left({\frac {1}{V_{m}}}+{\frac {B_{2}(T)}{V_{m}^{2}}}+\cdots \right)} This is the virial equation of state and describes a real gas.