Glossary ======== .. _extensive_quantity: Extensive quantity Its magnitude is additive for subsystems, e.g. volume, entropy, number of moles, displacement, induction, strain. .. _intensive_quantity: Intensive quantity Its magnitude is independent of the size of the system, e.g. temperature, pressure, chemical potential, electric field, magnetic field, stress .. _conjugate_quantity: 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. See the `wikipedia `_.