C + O2 ==> CO2
393.5 kJ x (6g/12g) = kJ heat released to burn 6g C.
X grams C = 12 x (39.3/393.5) =
how many Kj of heat are evolved when 6g of pure carbon is completely burned? how many grams of carbon must be burned to furnish 39.3 kJ of heat. enthalpy of combustion of carbon is -393.5
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