Section 4 chemistry

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  • Created by: wqt31
  • Created on: 27-04-16 14:45
Define Thermochemistry
Thermochemistry is the study of heat changes during chemical reactions.
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Define Exothermic
If a reaction is exothermic, the rection releases heat, energy has been given out.
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Define Endothermic
if a reaction is endothemic the reaction absorbs heat from the surroundings.
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Define enthalpy
a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.
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Define enthalpy change
The temperature change at a constant pressure.
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Standard molar enthalpy of formation
Enthalpy change when one mole of substance is formed from its constituent elements under standard conditions, all reactants and products being in their standard states.
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Standard molar enthalpy of combustion
the enthalpy change when one mole of substance is completely burnt in oxygen under standard conditions, all reactants and products being in their standard states.
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Other cards in this set

Card 2

Front

If a reaction is exothermic, the rection releases heat, energy has been given out.

Back

Define Exothermic

Card 3

Front

if a reaction is endothemic the reaction absorbs heat from the surroundings.

Back

Preview of the back of card 3

Card 4

Front

a thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.

Back

Preview of the back of card 4

Card 5

Front

The temperature change at a constant pressure.

Back

Preview of the back of card 5
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