what is the word equation for combustion
1 The balanced chemical equation for the complete combustion of methane gas is: CH4(g) + 2O2(g) â CO2(g) + 2H2O(g). 2  Write the word equation for the incomplete combustion of methane: general equation: reactants â products word equation: methane + oxygen gas â solid carbon + water vapour. atoms balanced. 1  The balanced chemical equation for the complete combustion of methane gas is: CH4(g) + 2O2(g) â CO2(g) + 2H2O(g).