Question #1:
Five kilograms of saturated liquid-vapor mixture of water is contained in an insulated tank under
100 KPa pressure. Initially, 25% of the mass is in the vapor phase. An electric resistor supplies
power of 0.75 KW into the tank.
a) Determine the mixture initial values for the internal energy, $u$, and the specific volume, $v$.
(40 points)
b) Applying the first law of thermodynamics, estimate the electrical energy needed to vaporize
all the liquid in the tank. Ignore both kinetic and potential energy of the water.
(30 points)
c) Determine how long would it take (in minutes) to vaporize all the liquid.
(30 points)