Chemistry, 18.02.2020 22:55 juliannabartra
Three of the reactions that occur when the paraffin of a candle (typical formula C21H44) burns are as follows:
(1) Complete combustion forms CO2 and water vapor.
(2) Incomplete combustion forms CO and water vapor.
(3) Some wax is oxidized to elemental C (soot) and water vapor.
a. find delta H combustion of each reaction for 1 mol C21H44 (delta Hf of C21H44 = -476 kJ/mol; use graphite for elemental carbon)
b. find q (in kJ) when a 413-g candle burns completely
c. find q (in kJ) when 5.19% mass of the candle burns incompletely and another 6.50% undergoes soot formation
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