液体简单混合物 Simple liquid mixtures 亨利定律Hen nry s law The English chemist William Henry found that for real solutions at low concentrations, although the vapour pressure of the solute is proportional to the mole fraction, the constant of proportionality is not the vapour pressure of the pure substance K 低浓度的真实溶液:溶质的蒸气 压与其在溶液中的摩尔分数xB When the 0∽ 成正比,比例常数为KB solute is dilute and solvent 注意:KB不同于纯液体的 obeys raoult Law very 饱和蒸气压P* closely KB的确定:实验曲线在XB=0 0 时的切线 Mole fraction of B, XE液体简单混合物 Simple Liquid Mixtures 亨利定律 Henry’s Law 低浓度的真实溶液: 溶质的蒸气 压与其在溶液中的摩尔分数xB 成正比, 比例常数为KB 注意: KB 不同于纯液体的 饱和蒸气压P* KB的确定: 实验曲线在XB=0 时的切线