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词汇 Standard entropy
分类 英语词汇 英语翻译词典
释义

Standard entropy

原声例句
Crash Course 综合篇

The energy units should match, so let's call the standard entropy 0.594 kilojoules per Kelvin.

能量单位应该匹配, 所以我们称标准熵为 0. 594 千焦每开尔文。

Crash Course 综合篇

Note that the standard enthalpy is in kilojoules while the standard entropy is in joules per Kelvin.

请注意,标准焓的单位是千焦耳, 而标准熵的单位是焦耳每开尔文。

英语百科

Standard molar entropy

In chemistry, the standard molar entropy is the entropy content of one mole of substance, under standard conditions (not standard temperature and pressure ).

The standard molar entropy is usually given the symbol S°, and as units of joules per mole kelvin (J mol K). Unlike standard enthalpies of formation, the value of S° is absolute. That is, an element in its standard state has a definite, nonzero value of S at room temperature. The entropy of a pure crystalline structure can be 0 J mol K only at 0 K, according to the third law of thermodynamics. However, this presupposes that the material forms a 'perfect crystal' without any frozen in entropy (defects, dislocations), which is never completely true because crystals always grow at a finite temperature. However this residual entropy is often quite negligible.

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