Thermochemistry definitions

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  • Created by: Tasha.L
  • Created on: 13-04-16 17:18
Standard enthalpy change of formation.
The enthalpy change when one mole of a compound is formed from its elements under standard conditions.
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The principle of conservation energy.
This states that energy cannot be created or destroyed, only changed from one state to another.
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Bond enthalpy.
The enthalpy change required to break a covalent bond with all its species in the gaseous state.
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Hess's Law
This states that the enthalpy change of a reaction is always the same, whatever route is taken from reactants to products.
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Standard enthalpy change of combustion.
This is the enthalpy change when one mole of a compound is burned completely in oxygen under standard conditions.
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Standard conditions.
a). All substances in their standard states. b). Pressure of 100kPa. c). Temperature of 298K.
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Elastic potential energy.
A type of energy within a system, caused by the position of atoms relative to one another.
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Enthalpy change.
The heat change of a reaction at constant pressure.
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Enthalpy
The total energy content of a system at constant pressure.
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Other cards in this set

Card 2

Front

This states that energy cannot be created or destroyed, only changed from one state to another.

Back

The principle of conservation energy.

Card 3

Front

The enthalpy change required to break a covalent bond with all its species in the gaseous state.

Back

Preview of the back of card 3

Card 4

Front

This states that the enthalpy change of a reaction is always the same, whatever route is taken from reactants to products.

Back

Preview of the back of card 4

Card 5

Front

This is the enthalpy change when one mole of a compound is burned completely in oxygen under standard conditions.

Back

Preview of the back of card 5
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