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Abstract
The amount of substance is one of the four fundamental properties of the thermodynamics in homogeneous media, along with volume, internal energy and entropy. This is a concept taught since high school, but it is not as elementary as it might seem. One aspect not always clear is the fact that it is related to the number of particles of the same chemical species present in the system, although varying at the same time in a continuum way, as do the other three fundamental properties.
Keywords
amount of substance, quantity of matter, mole, fundamentals of thermodynamics, homogeneous medium
Author
Adalberto B. M. S. Bassi
Universidade Estadual de Campinas, Instituto de Química
Translated by
João C. de Andrade
Revised by
Carol H. Collins
