enthalpy

基本解釋

Now for this experiment, this is a constant enthalpy experiment for the Joule-Thomson experiment, this is equal to zero.
對于這個實驗，焦耳-湯姆遜實驗,是一個焓不變的實驗,焓變化等于0，所以我可以。
麻省理工公開課 - 熱力學(xué)與動力學(xué)課程節(jié)選
But we've defined the enthalpy of those elements in their stable state at room temperature and pressure as zero, right?
但我們已經(jīng)定義了這些,元素處于它們室溫和常壓下,最穩(wěn)定的狀態(tài)時的焓為零，對吧？
麻省理工公開課 - 熱力學(xué)與動力學(xué)課程節(jié)選
And the bigger lesson from that is that entropy, unlike energy u or enthalpy H, we could define an absolutely number for it.
熱力學(xué)第三定律的一個更重要的推論是,與內(nèi)能和自由焓不同，我們可以給上定義一個絕對的數(shù)值。
麻省理工公開課 - 熱力學(xué)與動力學(xué)課程節(jié)選

In water the temperature changes are a good measure of relative enthalpy changes.
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a thermodynamic property of a system equal to the sum of its internal energy and the product of its pressure and volume ( symbol: Also called heat content, total heat)

焓
The phase transition for the former is controlled by the change of enthalpy, but the latter is controlled by the change of entropy.
前者相變主要是受焓變控制，而后者是受熵變控制。
溶解熱
熱函