Solve the below problem:
Q: A 100 Watt heater is used to melt 2 kg of solid ice at -10oC to liquid at +5oC at a constant pressure of 150 kPa.
a) Find the change in the total volume of the water.
b) Find the energy the heater must provide to the water.
c) Find the time the process will take assuming uniform T in the water.