Animated K8 + science " Chemistry of wood " . Wood's chemistry is tightly interlinked to its biology, with a common meeting point at cellulose, the biological unit of wood. The study of cellulose is the study of wood and the chemical process that take place due to its dissociation in presence of heat are what we call as burning. This chemistry animation gives in-depth information about how wood burning works.
The walls of all the plant cells are made up of cellulose.
It is very tough substance, made up from long molecules,
which are laid down in a crisscross pattern, giving strength
and rigidity to the cell. Cellulose is natural polymer (C6H10O5)
n. cellulose is a polysaccharide with
glucose as its monomer. Glucose molecule is result
of chemical bonding of carbon, hydrogen and oxygen
When wood burns, it releases energy in the form of heat
and light. As we know wood is a chemical composition
of carbon, oxygen and hydrogen. Hence when we supply heat
to wood the bond between glucose molecules breaks and carbon
oxygen and hydrogen become free. In the presence of oxygen,
carbon produces carbon monoxide and carbon dioxide.
In this reaction carbon is element that reacts with oxygen
in air and produces heat and light, however in our daily
life we use many carbon-containing materials but not all
are burning materials such as diamond.
In diamond covalent bonds in diamond are too strong
in comparison to wood therefore diamond does not burn.