In certain parts of the world, pressurized water from beneath the surface of the earth is available as a source of thermal energy. to make steam, the "geo-thermal water" at 180oc is passed through a "flash evaporator" that that operates at 1 atm pressure. two streams come ot of the evaporator, liquid water and water vapor. how much water vapor is formed per kg of geothermal water? is the process reversible? assume that the water is incompressible. the vapor pressure of water at 180oc is 1.0021 mpa (about 10 atm).

useful constants:

cp (water, liquid) = 4.18 j/(g*k)

cp (water, vapor) = 2.00 j/(g*k)

\deltahvap = 2261 j/g at 100oc

\deltahm = 334 j/g at 0oc