Why Are Combustion Reactions Generally Exothermic

question 31

Multiple Choice

Why are combustion reactions generally exothermic?

• A)Hydrogen easily pulls electrons from the oxygen in water molecules and are reduced.
• B)During combustion oxygen is oxidized,which gives off lots of energy.
• C)Combustion involves the transfer of electrons to oxygen,which has an extremely high tendency for gaining electrons.
• D)It is highly exothermic because combustion involves an oxidation-reduction reaction between a metallic material and oxygen.

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