burning...............

Asked by  | 2nd Jun, 2009, 10:57: AM

Expert Answer:

Burning is a chemical change because it involves changes in the chemical composition of the reactants.

In simple terms the molecular formulae of all the reactants and products are different.

For example, when fuel is burnt in the presence of oxygen, carbon dioxide and water are formed. This is accompanied by the release of large amount of energy.

So, here fuel is a hydrocarbon , oxygen is O2, carbon dioxide is CO2 and water is H2O. All have completely different molecular formula. So, it is a chemical change.

Answered by  | 2nd Jun, 2009, 02:19: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.