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单词 Entropy of mixing
释义

Entropy of mixing

中文百科

混合熵

设在一密闭容器的两边分别装有服从理想气体假设的两种气体1和2,其温度及压力均相同,中间以一隔板隔开。当隔板抽去之后,1 和2两种气体分别扩散至整个容器空间,直至分布均匀为止。设x_1\,x_2\,分别为气体1和气体2在混合气体中所占摩尔分数。混合熵\Delta S_m\,为:

\Delta S_m =  -nR(x_1\ln x_1 + x_2\ln x_2)\,

其中R\,为气体常数, n\, 为气体的摩尔数。

英语百科

Entropy of mixing 混合熵

In thermodynamics the entropy of mixing is the increase in the total entropy when several initially separate systems of different composition, each in a thermodynamic state of internal equilibrium, are mixed without chemical reaction by the thermodynamic operation of removal of impermeable partition(s) between them, followed by a time for establishment of a new thermodynamic state of internal equilibrium in the new unpartitioned closed system.

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更新时间:2025/6/17 19:56:51