Question

is biogas combustion reaction endothermic or exothermic?

Answer 1

Exothermic, hope it helps you.
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Answer 2

is biogas combustion reaction endothermic or exothermic?

• It is not an endothermic reaction. Combustion always involves the addition of O2,in combustion always energy is released and this energy is used to break the bonds of reactants. So combustion of methane is an exothermic reaction.