Complete combustion of butane
inside of a lighter is butane therefore the ignition of a lighter
provides a simple mean to study combustion of butane.
To analyze this combustion some tests are realized:
- If a
lighter flame is
put in a test tube, its walls are covered with condensation. We can
verify that this condensation is made of water using anhydrous copper
sulfate ( it should turn blue ).
Combustion continues a few moments and then the flame goes out.
- The test
tube is then used to collect gases produced during the combustion. In
this tube the lime water test is positive.
The combustion therefore produces water and carbon dioxide and It
consumes dioxygen and butane.
are butane and oxygen
Products are carbon dioxide and water
Butane + dioxygen
carbon dioxide + water
It is said
that such combustion is complete combustion.
combustion of butane
If there is
not enough dioxygen to burn all the butane then combustion is
In addition to other products it appears a black solid compound (
carbon ) and a gaseous compound colorless, odorless and very toxic (
carbon monoxide )
reaction is then :
→ carbon dioxide + water +
carbon + carbon
butane as well as methane, ethane and propane are natural gases. They
burn producing water and carbon dioxide, moreover these combustions may
also be incomplete.