Which statement about the following reaction is correct?

ch4 (g) + 2o2 (g) yields co2 (g) + 2h2o(l) deltah = -890 kj

reacting one mole of oxygen (o2) absorbs 445 kj of energy
reacting one mole of oxygen (o2) releases 445 kj of energy
reacting one mole of methane (ch4) absorbs 890 kj of energy
reacting two moles of methane (ch4) releases 890 kj of energy

reacting one mole of oxygen (O2) releases 445 kJ of energy

Explanation: Exothermic reactions are defined as the reactions in which energy is released in the form of heat and for the reaction comes out to be negative.

According to the given balanced equation:

1 mole of methane reacts with 2 moles of oxygen and 890 kJ of energy is released.

Thus when the reaction is halved, the enthalpy also gets halved.

Thus  

Now half mole of methane reacts with 1 mole of oxygen and 445 kJ of energy is released.

explanation: no but i do not usually comment

am i too late?

explanation: