Definition: The amount of
energy needed to get a reaction
started is called the activation
energy.
Example: A match wouldn't light
up without striking it and by striking
it you are causing a activation
reaction. A candle wouldn't burn
unless you strike a match to it.
3. Changing Bonds
4. Exothermic Reactions and Endothermic Reactions
1. Intro- definition and example
A teacher heats a small piece of sodium.
When the sodium cathches fire, she
places it in a flask of chlorine. The sodium
continues to burn and eventually withe
fumes are produced.
It is when substances are
broken apart and making
new ones from the pieces.