Additional Glossary

partial molar property,

denoted by an overline; indicates the change in an extensive thermodynamic variable as the number of particles in a system changes. This notation will be used in our discussion of multiphase systems, as partial molar properties are useful for discussing changes to a system’s property upon a change in the number of a single component

mechanical equilibrium

if a system has movable boundaries, at equilibrium the pressure of the system will be equivalent to the pressure of the surroundings

chemical equilibrium

if a system has open boundaries, at equilibrium the chemical potential of each component of the system will be equivalent to the chemical potential of each component in the surroundings