A cube of ice is taken from the freezer at -7.5°C and placed in a 101 g aluminum calorimeter filled with 282 g of water at room temperature of 20°C. The final situation is observed to be all water at 16°C. What was the mass of the ice cube?

Answer 1

The sum of heats gained is zero.

let m be the mass of the ice cube

m*specificheatice*(7.5)+m*Lfice+101*spcificheatAl*(16-20)+282specificheatwater*(16-20)=0

check that.