Calculate that he changed and kilocalories for melting 170 G of ice at zero Celsius

Answer 1

The ∆Hfusion for water is 334 J/g. This is the amount of heat energy needed to melt 1 g of ice at 0ºC (a phase change with no change in temperature).

170 g x 334 J/g = 56,780 J

Converting this to calories, we have...

56,780 J x 1 cal/4.184 J/cal = 13,571 cal

Converting this to kilocalories, we have...

13,571 cal x 1 kcal/1000 cal = 13.6 kcal