When the pressure is increased by the addition of gas, what happens to the chemical potential of the water in the vapor?
Info: Consider a two phase equilibrium between liwuid water and water vapor at 20 degrees C (293K). The equilibrium pressure = 17.5 torr. Suppose an additional gaseous component, e.g. helium, is pumped into the system, keeping the volume of the container fixed, until the final pressure is 100 atm. Assume that the helium does not dissolve in water but remains pure. Assume water is incompressible, and has a density of .998g/mL)