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1.1.2 The development history of thermal physics
In the ancient Greece:(500 B.C.) (1) Pythagoras: The fire is an independent and essential element of the nature (same with “five elements say”) (2) Plato: The fire is a kind of athletic manifestation At the beginning of 18 centuries, has the caloric theory says The middle of 18 centuries, the first law of thermodynamics: The conservation law of energy; The second law of thermodynamics: Concerning the thermal process is irreversible. 19 centuries, the kinetic theory of gases: heat is performance that molecule sport. the kinetic theory of gases statistics mechanics ( apply to thermal radiation) quantum, development 6 quantum mechanics at 1926.
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1.3.2 The zeroth law of thermodynamics
Such as the graph, two thermodynamics system 1,2 be placed in their equilibrium state( X, Y) and( X`, Y`) each at first. 绝热板:adiabatic wall 导热板:conducting wall