Combination reactions of oxygen with nonmetals such as carbon, sulfur, and nitro
ID: 695428 • Letter: C
Question
Combination reactions of oxygen with nonmetals such as carbon, sulfur, and nitrogen produce volatile oxides. The combustion of methane in this rocket engine being test fired at NASA is an example of an oxidation–reduction reaction. Include states of matter for all substances except for electrons. Write electrons as the letter e with a negative one superscript: e- Balance the following half-reaction showing the oxidation of carbon: CH4(g) --> CO2(g) The balanced half-reaction is: Balance the following half-reaction showing the reduction of oxygen: O2(g) --> H2O(g) The balanced half-reaction is:
Explanation / Answer
The complete balanced reaction for the combustion of methane is given as :
CH4 (g) + 2O2 (g) = CO2 (g) + H2O (g)
Oxidation half reaction is given as :
CH4 (g) + 2H2O (g) ---> CO2 (g) + 8H+ + 8e-
Reduction half reaction is given as :
2O2 (g) +8H+ +8e- ---> 4H2O (g)