The vapor pressure of pure water at 295 k is 2614.5 pa. the vapor forms an ideal gas.

1) in some oil, the equilibrium concentration of water molecules is only 1% as large as in pure water. suppose that the pure water is covered with a layer of that oil. what's the equilibrium vapor pressure of water above the oil layer?

2) what's the vapor pressure of water at 295 k above a sugar solution in which 1/32 of the molecules are sugars, not water? you may assume that the sugar is an ideal solute, as in the problem on sugar water chemical potential.
for ideal solutes the effect on the chemical potential of the water comes entirely from the dependence of the solute entropy on the volume of water available to it.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86