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

Question

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

anonymous · Answer

how do you start to understanding this?
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