COMPREHENSIVE REVIEW GUIDE WITH
SCENARIOS AND DETAILED SOLUTIONS FULLY
SOLVED EDITION 2026
◉How many kilojoules are required at 0 degree celsius to melt an ice
cube with a mass of 25g? Answer: heat =mass⋅Hfus
25 × 334 =8350 J
8350 J ÷ 1000 = 8.35 kJ
8.4 kJ
◉How many kilojoules are required to melt 15 g of ice at 0 degree
celsius, and raise the temperature of the liquid that forms to 85 degree
celsius? Answer: heat = mass⋅Hfus
15 g x 334 J/g = 5010 J
heat = mass⋅heat⋅ΔT
15g x 4.184 J/g C x 85 C = 5334.6 J
5010 J + 5334.6 J = 10344.6 J
10344.6 divided by 1000 = 10.3446 kJ
10 kJ