how many grams of ice at 0°C would be melted by 100 g of 100°C steam.
heat will be transferred from the steam to the ice in two processes: (a) the
steam will condense into liquid, and (b) that liquid will transfer heat until
it is at the freezing point of water.
Note that for water: Lf = 80 cal/g, and
Lv = 540 cal/g