Enthalpy

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Enthalpy of Formation
The enthalpy change when one mole of compound is formed from its constituent elements under standard conditions with all species in their standard states.
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Enthalpy of combustion
The enthalpy change when one mole of substance in burnt completely in oxyen under standard conditions with all products and reactants in their standard states.
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Hess' Law
The total enthalpy change of a reaction is always the same no matter which route is taken.
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Calculatin mean bond enthalpies
Energy release (products) - Energy absorbed (reactants)
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Two things you need to know to measure enthalpy change?
Number of moles of the substance and temperature change
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Enthalpy equation
q = mc^t
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When working out enthalpy changes with q=mc^t you...
use the formula, then work out moles, then divide the two
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In a formation triangle the arrows go
Up
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In a combustion triangle the arrows go
Down
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Other cards in this set

Card 2

Front

The enthalpy change when one mole of substance in burnt completely in oxyen under standard conditions with all products and reactants in their standard states.

Back

Enthalpy of combustion

Card 3

Front

The total enthalpy change of a reaction is always the same no matter which route is taken.

Back

Preview of the back of card 3

Card 4

Front

Energy release (products) - Energy absorbed (reactants)

Back

Preview of the back of card 4

Card 5

Front

Number of moles of the substance and temperature change

Back

Preview of the back of card 5
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