Calculate the heat change in kilojoules for melting 4.00 kg of ice at 0 ∘C.

Question

Express your answer as a positive value using three significant figures and include the appropriate units.

Answer 1

Using the ∆H_fusion for water of 334 J/g, we calculate as follows:

4.00 kg x 1000 g/kg x 344 J/g = 1,376,000 J = 1376 kJ = 1380 kJ (to 3 significant figures)