Departures from Raoults law are primarily from liquid-phase nonidealities ( i 1). But vapor-phase nonidealities (

Departures from Raoult’s law are primarily from liquid-phase nonidealities (γ_i ≠ 1). But vapor-phase nonidealities (ϕ i ≠ 1) also contribute. Consider the special case where the liquid phase is an ideal solution, and the vapor phase a nonideal gas mixture described by Eq. (3.36). Show that departures from Raoult’s law at constant temperature are likely to be negative. State clearly any assumptions and approximations.

Eq. (3.36)

Transcribed Image Text:

PV =1+ RT ВР Z=- (3.36) RT