The thermochemical equation of the reaction of coal combustion C + O2 = CO2 + 402.24 kJ

The thermochemical equation of the reaction of coal combustion C + O2 = CO2 + 402.24 kJ find the amount of energy released when burning 240 g of coal.

Let’s write down the thermochemical equation of the reaction:

C + O2 = CO2 + 402.24 kJ

Let’s find the amount of substance C:

v (C) = m (C) / M (C) = 240/12 = 20 (mol).

According to the reaction equation, 402.24 kJ of heat is released per 1 mol of C, therefore, 20 * 402.24 = 8044.8 kJ = 8.045 MJ of heat will be released per 20 mol of C.