# Why are some materials more flammable than others? [closed]

Wood and oil are flammable materials, but water isn't. Moreover, flames spread a lot faster in oil than in a piece of paper. What is the reason that it is so?

I also don't know why a small flame can spread out to a very big flame; what is the physical reason for it? I would like to know the molecular reasons in detail what makes fire so powerful.

• Have you tried the wikipedia article on fire? You are asking a lot of questions, but at least some of them should be answered there – Raditz_35 Dec 13 '17 at 12:49

$$\ce{C_nH_{n+2}(g,s,l) +\frac{3n +1}{2}O_2(g)-> nCO_2(g) +\frac{n +2}{2}H_2O(l)}$$