Question 16
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: c_ice=2.108 kJ/kgK, c_water=4.187 kJ/kgK, c_steam=1.99 kJ/kgK. Other relevant constants: ΔH_fus=334 kJ/kg, ΔH_fus=334 kJ/kg, ΔH_vap=2260 J/g.
Assume that the heat capacities of ice, water, and steam are constant in the given temperature ranges: c_ice=2.108 kJ/kgK, c_water=4.187 kJ/kgK, c_steam=1.99 kJ/kgK. Other relevant constants: ΔH_fus=334 kJ/kg, ΔH_fus=334 kJ/kg, ΔH_vap=2260 J/g.