The volume of the amount of coal is 0.12m3. What is the amount of heat at full limitation of coal?

The formula for the heat during combustion is Q = qm, where q is defined for the substance (written as a tabular value).
We do not know the mass, but the volume is known, and the density can be taken from the plate
Q = qm = qpv = 31 * 10 ^ 6 * 0.12 * 1.2 kg = 4464 kJ



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