suurus, mis näitab ühe mooli puhta aine entroopiat ehk süsteemi korrapäratuse ja mikroseisundite väärtusarvu kindlatel tingimustel
quantity representing the entropy of one mole of a pure substance - that is, the degree of disorder of a system and the number of microstates under specific conditions
Molaarentroopia on intensiivne suurus ning erinevalt üldisest entroopiast, mis on ekstensiivne ja sõltub ainehulgast, ei sõltu molaarentroopia aine kogusest, vaid on konkreetsele ainele omane konstant etteantud temperatuuril ja rõhul, nt termodünaamika kolmanda seaduse kohaselt on täiusliku kristallstruktuuriga aine entroopia absoluutsel nulltemperatuuril (0 K) võrdne nulliga (0 J/(mol·K).
Molar entropy is an intensive property; unlike total entropy, which is extensive and depends on the amount of substance, molar entropy does not depend on the quantity of the substance but is a constant characteristic of a specific substance at a given temperature and pressure, for example, according to the third law of thermodynamics, the entropy of a substance with a perfect crystal structure at absolute zero (0 K) is zero (0 J/(mol·K)).
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