How many calories are required to change 259 g of ice at 0 °C to steam at 100 °C?
q1 = heat needed to change phase of ice from solid to liquid(i.e., to melt ice)?
q1 = mass ice x heat fusioin
q2 = heat needed to raise T of liquid water from zero C to 100 C.
q2 = mass H2O x specific heat H2O x (Tfinal-Tinitial)
q3 = heat needed to change phase of liquid water to vapor(i.e., to boil the water)
q3 = mass H2O x heat vaporization.
Total = q1 + q2 + q3