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Energetics


Bond making releases energy- exothermic
Bond breaking requires energy- endothermic



1. EXOTHERMIC REACTION
e.g. burning and rusting

Substance involved in this type of reaction gets hotter, as
chemical energy is converted into thermal energy.
During the chemical reaction, energy is lost by the
chemicals, so is gained by the…

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You can use J- the heat change to find the enthalpy change, you must, divide J,
by 1000 to convert into KJ, and then divide by 1000 again as enthalpy change
is measures in Kj/mol.




Enthalpy (H) The heat energy stored in a chemical
system.

Enthalpy change (H) The heat…

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