Coal is in a box, the size of which is 2.5 m long, 1.8 m wide. Height 50 cm. How much heat will be released during the complete combustion of coal?
We first find the volume of coal in the box:
2.5 mx 1.8m x 0.5m = 2.25 m3
Find out the mass of such a volume of coal (density per volume)
Note hereinafter, we take into account that coal is hard coal, and not wood or some other kind.
2.25 kg x 1.35 = 3.04 kg
We multiply by the heat capacity:
3.04 kg x 1.3 * 10 ^ 6 = 3.949 * 10 ^ 6 J
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