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

Chemistry

Fuzzy

21 September, 22:42

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

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Answers (1)

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Charlize Gross · Answer 1

The statement about the following reaction "CH4 (g) + 2O2 (g) yields CO2 (g) + 2H2O (l) deltaH = - 890 kJ" is correct is reacting one mole of oxygen (O2) releases 445 kJ of energy. Since by reacting with two mole of oxygen, you will get a release of energy of - 890kJ so if only one mole of oxygen is to be reacted, you will get - 445 kJ of energy.