Propane, C3H8\mathrm{C_{3}H_{8}}C3H8, is used as a fuel in patio heaters. Propene, C3H6\mathrm{C_{3}H_{6}}C3H6, is made by cracking larger alkanes.
Balance the equation for the complete combustion of propane.
C3H8(g)+… O2(g)→… CO2(g)+… H2O(l)\mathrm{C_{3}H_{8}(g)} + \ldots\,\mathrm{O_{2}(g)} \rightarrow \ldots\,\mathrm{CO_{2}(g)} + \ldots\,\mathrm{H_{2}O(l)}C3H8(g)+…O2(g)→…CO2(g)+…H2O(l)
Write the balanced equation for the complete combustion of propene.
A patio heater burns 11 g of propane.
Calculate the mass of carbon dioxide produced. Relative formula masses: C3H8=44,CO2=44\mathrm{C_{3}H_{8}} = 44, \mathrm{CO_{2}} = 44C3H8=44,CO2=44
Patio heaters must be used in a well-ventilated place. Explain why.
36 exam-style questions on Edexcel GCSE Chemistry 10.2 Hydrocarbons, covering 10.2.1 Formulae and structures of the alkanes, 10.2.2 Alkenes and the C=C functional group, 10.2.3 Addition reactions of alkenes and testing for unsaturation, and 10.2.4 Combustion of alkanes and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.