Chemistry

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Chemical Energy
A form of potential energy that lies within chemical bonds
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Enthalpy
The thermal energy that is stored in a chemical system
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Enthalpy Change
The heat exchange with the surroundings during a chemical reaction, at constant pressure
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Exothermic Reaction
The enthalpy of the products produced is smaller than the enthalpy of the reactants
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Endothermic Reactions
The enthalpy of the products produced is greater than the enthalpy of the reactants
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Activation Energy
The minimum energy required to start a reaction by breaking bonds in the reaction
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Enthalpy Change of Reaction
The energy change associated with a given reaction
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Enthalpy Change of Formation
The energy change that takes place when 1 mole of a compound is formed from its constituent elements in their standard state under standard conditions
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Enthalpy Change of Combustion
The energy change that takes place when 1 mole of a substance is completely combusted
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Enthalpy Change of Neutralisation
The energy change associated with the formation of 1 mole of water from a neutralisation reaction
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Calorimetry
The quantitative study of energy in a chemical reaction
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Specific Heat Capacity
The energy required to raise the temperature of 1g of a substance by 1 K
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Average Bond of Enthalpy
The mean energy needed for 1 mole of a give type of gaseous bonds to undergo homolytic fission
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Hess's Law
States that the enthalpy change in a chemical reaction is independent of the route it takes
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Enthalpy Cycle
A pictorial representation shwoing alternative routes between reactans and products
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Rate of reaction
The change in concentration of a rectnt or a proudct in a given time
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Catalyst
A substance that increases the rate of reaction without being used up in the process
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Homogeneous Catalyst
When the catalyst for a reaction is in the same phase as the reactants
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Heterogeneous Catalyst
When the catalyst for a reaction is in a different phase from the reactants
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Boltzmann distribution
The distribution of energies of molecules at a particular temperature
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Equilibrium
There is no observable change to a reaction
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Other cards in this set

Card 2

Front

The thermal energy that is stored in a chemical system

Back

Enthalpy

Card 3

Front

The heat exchange with the surroundings during a chemical reaction, at constant pressure

Back

Preview of the back of card 3

Card 4

Front

The enthalpy of the products produced is smaller than the enthalpy of the reactants

Back

Preview of the back of card 4

Card 5

Front

The enthalpy of the products produced is greater than the enthalpy of the reactants

Back

Preview of the back of card 5
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