Two systems with the same “average kinetic energy” are not necessarily in equilibrium. Sometimes energy flows from a system with lower average kinetic energy to a system with higher average kinetic energy (eg. real gases with different degrees of freedom). Additionally “average kinetic energy” is not applicable at all to some systems, eg. ising magnet.
Two systems with the same “average kinetic energy” are not necessarily in equilibrium. Sometimes energy flows from a system with lower average kinetic energy to a system with higher average kinetic energy (eg. real gases with different degrees of freedom). Additionally “average kinetic energy” is not applicable at all to some systems, eg. ising magnet.