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11 Cards in this Set
- Front
- Back
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ΔHr, enthalpy change of reaction |
The enthalpy change when molar quantities of reactants, as specified by balanced chemical equation, react to form products under standard conditions. |
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ΔHf |
The enthalpy change which occurs when one mole of the substance is formed from its constituent elements in their standard states under standard conditions. |
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ΔHc |
The enthalpy change when one mole of substance is completely burnt in oxygen under standard conditions.
Exothermic |
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ΔHneut |
The enthalpy change which occurs when one mole of water is formed from the reaction of an acid and alkali under standard conditions.
Endothermic |
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ΔHat |
The enthalpy change when one mole of gaseous atoms is formed from the element in its standard state under standard conditions.
Endothermic |
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BOND ENERGY |
The average enthalpy change when one mole of covalent bonds between atoms and gaseous molecules is broken.
Endothermic |
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IE |
The enthalpy change when one mole of electrons is removed from one mole of gaseous atoms/cations. |
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EA |
The enthalpy change when one mole of gaseous atoms/anions accepts one mole of electrons.
Endothermic |
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LE |
The enthalpy change when one mole of solid ionic compound is formed from its constituent gaseous ions under standard conditions.
Exothermic |
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ΔHhyd |
The enthalpy change when one mole of gaseous ions is hydrated under standard conditions.
Exothermic |
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ΔHsoln |
The enthalpy change when one mole of the substance is completely dissolved to give an infinitely dilute solution under standard conditions, so that no further enthalpy change takes place on adding more solvent.
soln = -LE + hyd |
