2.2 Vapor Pressure Lowering of A Solution 2.2.1 Vapor-pressure evaporation HOO condensation H2O(g) 1: liquid phase g: gas phase Definition When a dynamic equilibrium is reached in the liquid and gas phase at a given temperature, the saturated vapor pressure of this system is the vapor-pressure (symbol p). The unit is Pa or kPa2.2 Vapor Pressure Lowering of A Solution 2.2.1 Vapor-pressure H2O (l) H2O (g) evaporation condensation l: liquid phase g: gas phase Definition: When a dynamic equilibrium is reached in the liquid and gas phase at a given temperature, the saturated vapor pressure of this system is the vapor-pressure (symbol p ). The unit is Pa or kPa