# What type of chemical reaction is CH_4 + 2O_2 -> CO_2 + 2H_2O?

While this is certainly an example of combustion, the reaction falls under the more general class of redox reactions. Oxygen gas is reduced to oxide (i.e. ${O}^{2 -}$). Carbon (as ${C}^{- I V}$) is oxidized to ${C}^{I V}$. Now, normally we would balance this equation by the method of oxidation numbers and electron transfer; here, we don't need to, and we simply balance the thing.