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.

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.

Outermost (valence) electrons

Ithe undersigned only for use your own email and delete any and copies and of the itself and to be there is a good timewhat does a decrease in temperature indicate about the molecules in a sample of liquid water? decreased chemical energy of the moleculesdecreased kinetic energy of the moleculesincreased chemical energy of the moleculesincreased kinetic energy of the moleculeshow does a sample of helium at 15 â°c compare to a sample of helium at 215 k? the helium at 15 â°c has a higher average kinetic energy than the sample at 215 k.the helium at 15 â°c has lower nuclear energy than the sample at 215 k.the helium at 15 â°c has slower-moving atoms than the sample at 215 k.the helium at 15 â°c has smaller atoms than the sample at 215 k.