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Energy

Energy is involved in all chemical reactions
When a reaction happen bonds have to be broken and then
remade in different combination

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Bond breaking takes in energy
Endothermic

Bond making releases energy
Exothermic

We can calculate the energy release using the following
equation




Where :
C = specific heat capacity ( always 4.2 J / g /
M = mass of whatever is being heated
T = change in temperature ( difference…

Page 3

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Endothermic

Over the whole reaction is less energy is released than
taken in the whole reaction is endothermic
An endothermic reaction is shown by a temperature
decrease
An example of endothermic reaction is photosynthesis ­
energy from the sun is taken in

Page 4

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Comments

Joseph101 - Team GR

A nice resource but could do with reference to activation energy possibly? 

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