An intrepid explorer takes 400 g of ice from the cold Siberian environment, where the temperature is –40 degrees and places it in a kettle inside his mobile laboratory. The ice melts and he heats the water to +40 degrees. What is the total amount of heat absorbed by the explorer’s sample of H2O?

Answer 1

q1 = heat absorbed to raise T from -40 to zero.
q1 = mass ice x specific heat ice x (Tfinal-Tinitial)

q2 = heat absorbed to melt ice at zero to form liquid water at zero..
q2 = mass ice x heat fusion.

q3 = heat absorbed to raise T liquid water from zero to +40C.
q3 = mass water x specific heat water x (Tfinal-Tinitial).

Total q = q1 + q2 + q3.