Given the balanced equation representing a reaction:
CH4 (g) + 2O2 (g) - - > 2H2O (g) + CO2 (g) + heat
Which statement is true about energy in this reaction?
(1) The reaction is exothermic because it releases heat.
(2) The reaction is exothermic because it absorbs heat.
(3) The reaction is endothermic because it releases heat.
(4) The reaction is endothermic because it absorbs heat.
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