PhaseequilibriaVAPOUR PRESSURE OF SOLUTIONSAdding an impurity lowers the vapor pressure of a liquidThis lowering of vapor pressure is caused by the fact that thereare fewer solvent particles on the surface of the liquid so fewercan escape into the vapor phaseThe more impurity that is added, the greater the lowering of thevaporpressure16
16 Phase equilibria Adding an impurity lowers the vapor pressure of a liquid. This lowering of vapor pressure is caused by the fact that there are fewer solvent particles on the surface of the liquid so fewer can escape into the vapor phase. The more impurity that is added, the greater the lowering of the vapor pressure. VAPOUR PRESSURE OF SOLUTIONS
Phase equilibriapurelicimpureliquid,i.e.solutionpressureAp:loweringinvapourpressuretemperature888Concentrated solutionDilute solutionPuresolventOnlyafewparticlesareSomeparticles aresoluteAll the particles cansolventandcan escape.andcannotescape.escape17Vapour pressure reducedVapourpressurelessVapourpressurenormaleven more
17 Phase equilibria
Phase equilibriaWordsWordsphase diagramvapor pressureimpurity: impure18
18 Phase equilibria Words Words phase diagram vapor pressure impurity: impure