# How do I write equation for the combustion of CH4 to give CO2 and water?

Nov 25, 2015

$\text{CH"_4" + 2O"_2}$$\rightarrow$$\text{CO"_2" + 2H"_2"O}$

#### Explanation:

Unbalanced Equation

$\text{CH"_4" + O"_2}$$\rightarrow$$\text{CO"_2" + H"_2"O}$

Balance the hydrogen.

Place a coefficient of $2$ in front of the $\text{H"_2"O}$.

$\text{CH"_4" + O"_2}$$\rightarrow$$\text{CO"_2" + 2H"_2"O}$

Balance the oxygen.

Place a coefficient of $2$ in front of the $\text{O"_2}$.

$\text{CH"_4" + 2O"_2}$$\rightarrow$$\text{CO"_2" + 2H"_2"O}$

There are now equal numbers of atoms of each element on both sides of the equation, and it is now balanced.

Number of Atoms on Left Side: $\text{1C; 4H; 4O}$

Number of Atoms on Right Side: $\text{1C; 4H; 4O}$