Chemical equation





In chemistry, a chemical equation is a symbolic representation of a chemical
reaction. For example, the combustion of methane in oxygen is

     CH4 + 2ÊO2 → CO2 + 2ÊH2O,

and the reversible reaction of the Haber process is

     N2(g) + 3H2(g)  2NH3(g) + ΔH.