Question

PUTTING MAX POINTS

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

Answer 1

the first one is correct because one mole of oxygen is half of 2O2 so it is half of the energy

Answer 2

the first one is correct because one mole of oxygen is half of 2O2 so it is half of the energy


it absorbs because the negative sign indicates energy taken inside

hope this helps