Bonds and Energy

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∆H is positive for an endothermic reaction.

Slide 15

Making and breaking bonds

We have seen how bonds are formed (both ionic and covalent)

Do you think energy is needed to break bonds?

Slide 16

Slide 17

Breaking bonds requires energy. It is endothermic.

Slide 18

Breaking bonds requires energy. It is endothermic.

Making new bonds gives out energy. It is exothermic.

Slide 19