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6 Cards in this Set
- Front
- Back
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The standard enthalpy change of formation
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The enthalpy chance that takes place when one mole of a compound is formed from it's constituent elements in their standard states under standard conditions
Usually an exothermic process for an ionic compound |
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The standard change of atomisation
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Thry enthalpy change that takes place when one mole of gaseous atoms forms from the element in it's standard state
Always an endothermic process (bonds are broken)to |
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The first ionisation energy
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Tht enthalpy change accompanying the removal of one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions
Endothermic as the electron being lost has to overcome attraction from the nucleus in order to leave the atom |
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The second ionisation energy
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The enthalpy change accompanying the removal of one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions
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The first electron affinity
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The enthalpy change accompanying the addition of one electron to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions
Exothermic because the electron is attracted into the outer shell of an atom by the nucleus |
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The second electron affinity
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The enthalpy change accompanying the addition of one electron to each ion in one mole of gaseous 1- ions to form one mole of gaseous 2- ions
Endothermic because the electron is repelled by the 1- ion and this repulsion has to be overcome |
