Bonds & Energy Changes Flashcards

All 4 cards in this deck

True or false? Energy is released when a bond is broken.

False. Energy is absorbed (taken in) when a bond is broken — bond breaking is endothermic.

Is making (forming) a bond exothermic or endothermic?

Exothermic — energy is released when a bond is made.

In terms of bond breaking and bond making, when is a reaction overall exothermic?

When more heat energy is given out forming bonds in the products than is taken in breaking bonds in the reactants.

In terms of bond breaking and bond making, when is a reaction overall endothermic?

When less heat energy is released forming bonds in the products than is required to break bonds in the reactants.