Question

Supports combustion is it physical or chemical property?

Answer 1

Chemical change is characterized by the formation of new products and the making and breaking of strong chemical bonds...

Explanation:

When an hydrocarbon, say methane, is combusted, i.e. reacted with dioxygen we write the chemical equation...

`CH_4(g) + 2O_2(g) rarr CO_2(g) + 2H_2O(l) + Delta`

Strong `C-H` and `O=O` bonds HAVE been broken to form STRONGER `C=O` and `H-O` bonds...that stronger bonds have been formed result in the release of energy, and so this reaction is exothermic.