Energy Changes Key Words Chemistry

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Activation energy
The minimum amount of energy required for a reaction to take place.
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Cell (electrical)
Contains chemicals that react together to release energy.
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Endothermic reaction
A reaction that takes in energy from the surroundings.
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Energy level diagram
(Reaction profile) a diagram showing the relative energies of the reactants and the products of a reaction, the activation energy and the overall energy change of the reaction.
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Exothermic reaction
A reaction that gives out energy to the surroundings.
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Fuel cell
A very efficient way of producing electrical energy in which a fuel is oxidised electrochemically to produce a potential difference or voltage.
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Reaction profile
(Energy level diagram) a diagram showing the relative energies of the reactants and the products or a reaction, the activation energy and the overall energy change of the reaction.
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Reversible reaction
A reaction that can go forwards or backwards.
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Other cards in this set

Card 2

Front

Contains chemicals that react together to release energy.

Back

Cell (electrical)

Card 3

Front

A reaction that takes in energy from the surroundings.

Back

Preview of the back of card 3

Card 4

Front

(Reaction profile) a diagram showing the relative energies of the reactants and the products of a reaction, the activation energy and the overall energy change of the reaction.

Back

Preview of the back of card 4

Card 5

Front

A reaction that gives out energy to the surroundings.

Back

Preview of the back of card 5
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