The thermal effect of the chemical reaction of carbon combustion is 412 kJ.

The thermal effect of the chemical reaction of carbon combustion is 412 kJ. How much heat will be released if carbon is burned in 56 liters of oxygen?

Let’s write the thermochemical equation of the reaction:

C + O2 = CO2 + 412 kJ

Let’s find the amount of oxygen substance:

v (O2) = V (O2) / Vm = 56 / 22.4 = 2.5 (mol).

According to the reaction equation, 412 kJ of heat is released per 1 mol of O2, therefore 2.5 * 412 = 1030 kJ = 1.03 MJ of heat will be released per 2.5 mol of O2.