Question 17
A mass of ice at -50 °C is heated slowly until it melts, becomes liquid, and ultimately steam, at 140 °C. Assuming no mass loss during heating, at what stage of the process is the system requiring the most amount of heat?
Assume that the heat capacities of ice, water, and steam are constant in the given temperature ranges: cice=2.108 kJ/kgK, cwater=4.187 kJ/kgK, csteam=1.99 kJ/kgK. Other relevant constants: ΔHfus=334 kJ/kg, ΔHfus=334 kJ/kg, ΔHvap=2260 J/g.
Assume that the heat capacities of ice, water, and steam are constant in the given temperature ranges: cice=2.108 kJ/kgK, cwater=4.187 kJ/kgK, csteam=1.99 kJ/kgK. Other relevant constants: ΔHfus=334 kJ/kg, ΔHfus=334 kJ/kg, ΔHvap=2260 J/g.