Question: Which statement is true about the reaction A + B C + D + heat? 1) The forward and reverse reactions are exothermic. 2) The

Which statement is true about the reaction A + B C + D + heat? 1) The forward and reverse reactions are exothermic. 2) The forward reaction is exothermic, and the reverse reaction is endothermic. 3) The forward reaction is exothermic, and the reverse reaction can be either endothermic or exothermic. 4) The forward reaction is endothermic, and the reverse reaction can be either endothermic or exothermic

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