Hello, Daisy,
As in a separate problem you had asked, we need the heat of fusion for water, but this time in units of cal/g. We could calculate the answer in Joules and then convert Joules to calories afterwards, but the value for the heat of fusion of water in calories is 80 cal/g, so let's use that here.
140 g * (80 cal/g) = 11,200 calories, or 11.2 Kcal
Technically, we only have 2 sig figs, so that should be expressed as 11 Kcal.
Bob
