What amount of heat is released during the complete combustion of charcoal weighing 15 kg of alcohol weighing 200 g?

The amount of heat that is released during complete combustion of the fuel can be determined by the formula: Q = qх * mх, where qх is the specific heat of combustion of the fuel, mх is the mass of the burned fuel.

1) Combustion of charcoal (q1 = 34 * 10 ^ 6 J / kg, m1 = 15 kg): Q1 = 34 * 10 ^ 6 * 15 = 510 * 10 ^ 6 J = 510 MJ.

2) Combustion of alcohol (q2 = 27 * 10 ^ 6 J / kg, m2 = 200 g = 0.2 kg): Q2 = 27 * 10 ^ 6 * 0.2 = 5.4 * 10 ^ 6 J = 5, 4 MJ.