[Engine Student]

I have problem

A cylinder containing 1 kg of water is closed by frictionless piston and a constant pressure of 0.1 atm is applied on the back of the piston. After establishing equilibrium, 10 wt% of the water remains in liquid state. Some additional heat Q_add is then transferred reversibly to the cylinder until all of the water evaporates.
a. Estimate the equilibrium temperature in the system by using the steam tables.
b. Alternatively, esimate the same temperature using the heat of vaporization of water, which is 2255  kJ/kg at 100^oC and 1 atm. Did you get a reasonably good estimate, and if yes/no why?
c. Estimate the value of Q_add

Anyone can help me??

[Gerard]

I have problem

A cylinder containing 1 kg of water is closed by frictionless piston and a constant pressure of 0.1 atm is applied on the back of the piston. After establishing equilibrium, 10 wt% of the water remains in liquid state. Some additional heat Q_add is then transferred reversibly to the cylinder until all of the water evaporates.
a. Estimate the equilibrium temperature in the system by using the steam tables.
b. Alternatively, esimate the same temperature using the heat of vaporization of water, which is 2255  kJ/kg at 100^oC and 1 atm. Did you get a reasonably good estimate, and if yes/no why?
c. Estimate the value of Q_add

Anyone can help me??

[Gerard]

read the books:
chemical,biochemical and engineering thermodynamics by stanley sandler and chemical engineering thermodynamics by smith van ness
it will help you....
(i want to solve the problem but sorry gor no time,busy with my reserach)