It implies the existence of a quantity called the entropy of a thermodynamic system. In terms of this quantity it implies that
It implies the existence of a quantity called the entropy of a thermodynamic system. In terms of this quantity it implies that
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这意味着热力学系统中存在一个叫做熵的量。了一个叫做热力学系统熵的量的存在。就这个数量而言,它意味着
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这意味着热力学系统中存在一个叫做熵的量。就这个数量而言,它意味着
{{quote|When two initially isolated systems in separate but nearby regions of space, each in [[thermodynamic equilibrium]] with itself but not necessarily with each other, are then allowed to interact, they will eventually reach a mutual thermodynamic equilibrium. The sum of the [[entropy|entropies]] of the initially isolated systems is less than or equal to the total entropy of the final combination. Equality occurs just when the two original systems have all their respective intensive variables (temperature, pressure) equal; then the final system also has the same values.}}<br>
{{quote|When two initially isolated systems in separate but nearby regions of space, each in [[thermodynamic equilibrium]] with itself but not necessarily with each other, are then allowed to interact, they will eventually reach a mutual thermodynamic equilibrium. The sum of the [[entropy|entropies]] of the initially isolated systems is less than or equal to the total entropy of the final combination. Equality occurs just when the two original systems have all their respective intensive variables (temperature, pressure) equal; then the final system also has the same values.}}<br>