基本内容

如果两个热力学系统中的每一个都与第三个热力学系统处于热平衡(温度相同)，则它们彼此也必定处于热平衡。这一结论称做“热力学第零定律”。(zeroth law of thermodynamics:The zeroth law states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other.)