"Chemistry Alkanes' Combustion Worksheet" - United Kingdom

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C h e m g u i d e – q u e s t i o n s
ALKANES: COMBUSTION
1. Write equations for the complete combustion of
a) pentane, C
H
5
12
b) ethane, C
H
2
6
c) decane, C
H
10
22
d) cyclohexane, C
H
6
12
2. If you drop a lighted match onto some petrol (gasoline), it ignites almost explosively. If you drop a
lighted match onto some tar on the road, almost certainly nothing will happen. Both contain
alkanes, Explain the difference.
3. a) Why does a bunsen burner with the air-hole closed produce a yellow flame?
b) Explain why carbon monoxide, formed by incomplete combustion of hydrocarbons, is poisonous.
www.chemguide.co.uk
C h e m g u i d e – q u e s t i o n s
ALKANES: COMBUSTION
1. Write equations for the complete combustion of
a) pentane, C
H
5
12
b) ethane, C
H
2
6
c) decane, C
H
10
22
d) cyclohexane, C
H
6
12
2. If you drop a lighted match onto some petrol (gasoline), it ignites almost explosively. If you drop a
lighted match onto some tar on the road, almost certainly nothing will happen. Both contain
alkanes, Explain the difference.
3. a) Why does a bunsen burner with the air-hole closed produce a yellow flame?
b) Explain why carbon monoxide, formed by incomplete combustion of hydrocarbons, is poisonous.
www.chemguide.co.uk