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
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.
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