mvi	mass of vapor of constituent i in indoor space at time t (kg)
mli	mass of liquid of constituent i in indoor space at time t (kg)
mi	mass of constituent i in indoor space at time t (kg)
Ci	concentration of constituent i in indoor space (kg/m3)
Vr	volume of indoor space (m3)
Qa	air ventilation (m3/s)
t	time (s)
γi	activity coefficient (dimensionless)
xi	mole fraction of i in particle, liquid phase
yi	mass fraction of i in particle, liquid phase
Psat	saturation pressure at given temperature (kPa)
R	universal gas constant (kJ/(kmol·K))
T	temperature (K)
Mi	molecular mass of i (kg/kmol)
M	molecular mass of the mixture in particle (liquid phase) (kg/kmol)
ρ	density of vapor of i in air (kg/m3)