A 5.00 g sample of H2O is removed from a freezer and heated froman initial temperature of -5.00 oC through to a final temperatureof 102.0 oC.
(a) Given the following data, calculate the amount of energythat has to be absorbed by the H2O during the whole process.
Freezing point of H2O = 0.00oC;
Boiling point of H2O = 100.oC
ΔHfusion of H2O = 6.01 kJ mol-1
ΔHevaporation of H2O = 40.7 kJ mol-1
Specific heat capacity of ice = 2.05 J g-1 K-1;
Specific heat capacity of water = 4.18 J g-1 K-1
Specific heat capacity of steam = 2.08 J g-1 K-1
(b) Calculate the percentage of the total energy required forthe overall process in (a) that is used just in heating the liquidwater.
(c) Calculate the mass of ice at 0.00oC, that can be melted in30 minutes by a heater that produces 8000 kJ of energy per hour butin such a way that only 70% of the heat produced is absorbed by theice.
