Amagat's Law:

Volume of an ideal gas mixture is equal to the sum of the partial volumes

(34.13)

V = total volume of the mixture

V_i = partial volume of the species i

    = volume of the species if it existed alone in the given temperature T and pressure P

For an ideal gas

(34.14)

Amagat's Law

or

(34.15)

The volume fraction of species i

or,

(34.16)

Volume fraction = Mole fraction

Mass based analysis is known as gravimetric analysis

Mole based analysis is known as molar analysis