Glossary¶

Extensive quantity: Its magnitude is additive for subsystems, e.g. volume, entropy, number of moles, displacement, induction, strain.

Intensive quantity: Its magnitude is independent of the size of the system, e.g. temperature, pressure, chemical potential, electric field, magnetic field, stress

Conjugate quantities

A pair of variables that their product has the dimension of energy or energy per unit volume, e.g. temperature and entropy, pressure and volume.