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9 Cards in this Set
- Front
- Back
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Rate of reaction |
The change in concentration of a reactant or product in a given time |
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Collision theory |
To reacting particles must Collide for a reaction to occur and must be in the correct orientation and have sufficient energy to overcome the activation energy of the reaction |
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Catalyst |
A substance that increases the rate of a chemical reaction without being used up in the process. A catalyst provides an alternative route for reaction with the activation energy |
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Homogeneous |
Reaction in which The Catalyst and reactants are in the same physical state, which is most frequently the aqueous or gaseous state |
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Heterogeneous |
Reaction in which the catalyst has a different physical state from the reactants, frequently reactants are gases whilst the catalyst is a solid |
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Boltzmann distribution |
The spread of molecular energies in gases. Graph is marked with line Ea representing activation energy |
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Dynamic equilibrium |
The equilibrium that exist in a closed system when the rate of the reverse reaction and concentrations do not change |
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Le chateliers principle |
When a system in equilibrium is subjected to an external change the system readjust itself to minimise effects of that change |
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Equilibrium constant, KC |
Provide actual position of equilibrium it's magnitude indicate whether there are more reactants or more products in equilibrium system |
