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22 February, 05:50

Where does the energy given off by an exothermic reaction come from?

A. The chemicals make the energy during the reaction from atoms that are consumed.

B. The atoms in the air are converted to energy during the explosion.

C. The energy is converted from the heat taken in by the exothermic reaction.

D. More energy is given off by the new bonds formed than is needed to break the original bonds.

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  1. 22 February, 07:02
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    D.

    Bond formation releases energy, while bond breakage requires energy. When the energy released during bond formation is greater than that required during bond breaking, the reaction is exothermic.
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