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Write chemical equations for the combustion reaction of the following hydrocarbons.
(i) Butane
(ii) Pentene
(iii) Hexyne
(iv) Toluene
(i) Butane
(ii) Pentene
(iii) Hexyne
(iv) Toluene
Solution:
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(i) \(\underset{\text{Butane}}{\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})}+13 / 2 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 4 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(ii) \(\underset{\text{Pentene}}{\mathrm{C}_5 \mathrm{H}_{10}(\mathrm{~g})}+15 / 2 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 5 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(iii) \(\underset{\text{Hexyne}}{\mathrm{C}_6 \mathrm{H}_{10}(\mathrm{~g})}+17 / 2 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 6 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(iv)
or \(\quad \mathrm{C}_7 \mathrm{H}_8(\mathrm{~g})+9 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 7 \mathrm{CO}_2(\mathrm{~g})+4 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(ii) \(\underset{\text{Pentene}}{\mathrm{C}_5 \mathrm{H}_{10}(\mathrm{~g})}+15 / 2 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 5 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(iii) \(\underset{\text{Hexyne}}{\mathrm{C}_6 \mathrm{H}_{10}(\mathrm{~g})}+17 / 2 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 6 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
(iv)
or \(\quad \mathrm{C}_7 \mathrm{H}_8(\mathrm{~g})+9 \mathrm{O}_2(\mathrm{~g}) \stackrel{\Delta}{\longrightarrow} 7 \mathrm{CO}_2(\mathrm{~g})+4 \mathrm{H}_2 \mathrm{O}(\mathrm{g})\)
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