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单词 Entropic force
释义

Entropic force

中文百科

熵力

熵力(英语:Entropic force)在物理学中是指一个系统中的一种宏观作用力,其性质主要不是由这个系统中的某种特定的微观作用力(如电磁力)决定,而是表现为整个系统对于熵增加的统计趋势。例如弹力或压力皆是种熵力。

英语百科

Entropic force 熵力

In physics, an entropic force acting in a system is a force resulting from the entire system's thermodynamical tendency to increase its entropy, rather than from a particular underlying microscopic force.

For instance, the internal energy of an ideal gas depends only on its temperature, and not on the volume of its containing box, so it is not an energy effect that tends to increase the volume of the box as gas pressure does. This implies that the pressure of an ideal gas has an entropic origin.

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