The first law of Thermodynamics
The total amount of energy in the universe is constant,energy cannot be created nor destoryed,it can merely be changed from one form to another.
The second law of Thermodynamics
in any transfer of energy from one form to anther,useful energy is lost.
The third law of thermodynamics
the entropy of a system will approach a constant value as the temperature decreases,and that the entropy of a pure crystal will be zero at a certain temperature (absolute zero).
--转自everything2.com
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