Energy in chemical reactions

Heat

Exothermic

An $exothermic$ reaction is one that $gives out heat$

Exo (exit)

Thermic (themperature)

Endothermic

An $endothermic$ reaction is one that $takes in heat$

Collision Theory

When a $chemical reaction$ occurs, certain $energy changes$ must take place

For the $reaction$ to occur, the particles of the reactants must collide with each other to produce a $product$, they can only do this is a $certain minimum energy$ is reached during the collision

This is called $effective collision$

Effective collision: a collision that results in the formation of products

Activation energy: minimum amount of energy needed for an effective collision to occur

Energy profile diagram

An energy profile diagram is a graph that shows a change in energy of a chemical reaction with time as the reaction takes place

x-axis: time

y-axis: change in energy

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