Gas-Liquid Systems One Condensable Component

TEST 1- Define and give examples of extensive and intensive variables. Define degrees of free- 

YOURSELF dom of a system. What is the Gibbs phase rule  

Systems containing several components, of which only one is capable of existing as a liquid at the process conditions, are common in industrial processes. Separation processes that involve such systems include evaporation, drying, and humidification—all of which involve transfer of liquid into the gas phase—and condensation and dehumidification, which involve transfer of the condensable species from the gas to the liquid phase. 

Suppose liquid water is introduced into a chamber that initially contains dry air and that the temperature and pressure in the system are kept constant at 75°C and 760 mm Hg. Initially the gas phase contains no water (phjO = 0) and water molecules consequently begin to evaporate. The mole fraction of water in the gas phase, vH 0 increases, and hence so does the partial pressure of water. pH-.o = Eventually, however, the amount of water in the gas phase is 

Let us apply the Gibbs phase rule to this equilibrium system. Since there are two phases and two components. 

---