Question

addition reactions of alkanes

Answer 1

CH4(g) + 2 O2(g) " width="68" height="12">CO2(g) + 2 H2O(g)

the mixture of butane and isobutane used in disposable cigarette lighters,

2 C4H10(g) + 13 O2(g) " width="68" height="12">8 CO2(g) + 10 H2O(g)

the mixture of C5 to C6 hydrocarbons in charcoal lighter fluid,

C5H12(g) + 8 O2(g) " width="68" height="12">5 CO2(g) + 6 H2O(g)

or the complex mixture of C6 to C8hydrocarbons in gasoline.

2 C8H18(l) + 25 O2(g) " width="68" height="12"> 16 CO2(g) + 18 H2O(g)

Once the reaction is ignited by a spark, these hydrocarbons burn to form CO2 and H2O and give off between 45 and 50 kJ of energy per gram of fuel consumed.

In the presence of light, or at high temperatures, alkanes react with halogens to form alkyl halides. Reaction with chlorine gives an alkyl chloride.

lightCH4(g) + Cl2(g)" width="68" height="12">CH3Cl(g) + HCl(g)

Reaction with bromine gives an alkyl bromide.