Combustion Reactions (HSC SSCE Chemistry): Flashcards

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Combustion Reactions
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Combustion reaction definition

Substance burns in O2\text{O}_2 at high temp, releases heat & light

Hydrocarbon definition

Compound made only of carbon and hydrogen atoms

Products of complete hydrocarbon combustion

CO2\text{CO}_2 and H2O\text{H}_2\text{O} only

Products of incomplete hydrocarbon combustion

CO\text{CO} (carbon monoxide) and/or soot (carbon)

Self-sustaining combustion meaning

Reaction generates enough heat to continue without extra energy

Oxygen supply: complete vs incomplete combustion

Complete: sufficient O2\text{O}_2; Incomplete: limited O2\text{O}_2

Flame colour indicating complete combustion

Blue flame

Flame colour indicating incomplete combustion

Yellow or orange flame

Why is carbon monoxide dangerous?

Toxic, binds to haemoglobin, prevents oxygen transport

Order to balance combustion equations

Carbon first, then hydrogen, then oxygen last (CHO)

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