Suppose that coal of density 1.5 gcm3 is pure carbon. it is, Ask an Expert

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Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.) The combustion of carbon is described by the equation C(s) + O2(g) -! CO2(g) H? = -394 kJ What is the value of q (heat) when a lump of coal of size 8.5 cm×8 cm×7.5 cm is burned? Answer in units of kJ.

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