Question: how much energy in joules is released when 17 kilograms?
Answer: Solution: Where: m = 17 kg; T = 45°C - 21°C = 24 °C; And, from a table the specific heat, C, of granite is 790 J/kg°C; Therefore, [ you get: 17 kg * 790 J/kg°C * (24°C) = 322,320. 332,320 joules is released when 17 kilograms of granite is cooled from 45 degrees Celsius to 21 degrees Celsius.