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15 Cards in this Set
- Front
- Back
Enthalpy of formation |
Enthalpy change when 1 mole of a substance is formed from its constituent elements with all substances in their standard states. Exothermic for most. |
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Enthalpy of combustion |
Enthalpy change when 1 mole of a substance undergoes complete combustion in oxygen with all substances in their standard states. Exothermic. |
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Enthalpy of neutralisation |
Enthalpy change when 1 mole of water is formed in a reaction between an acid and alkali under standard conditions. Exothermic |
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Ionisation enthalpy - 1st ionisation energy. |
Enthalpy change when each atom in 1 mole of gaseous atoms loses 1 electron to form 1 mole of gaseous 1+ ions. Endothermic. |
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Ionisation enthalpy - 2nd ionisation energy. |
Enthalpy change when each ion in 1 mole of gaseous 1+ ions loses 1 electron to form 1 mole of gaseous 2+ ions. Endothermic. |
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Electron affinity - 1st |
Enthalpy change when each atom in 1 mole of gaseous atoms gains 1 electron to form 1 mole of gaseous 1- ions. Exothermic for many non-metals. |
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Electron affinity - 2nd |
Enthalpy change when each ion in 1 mole of gaseous 1- ions gains 1 electron to form 1 mole of gaseous 2- ions. Endothermic - adding -ve electron to -ve ion. |
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Enthalpy of atomisation |
Enthalpy change when 1 mole of gaseous atoms is produced from an element in its standard state. Endothermic. |
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Hydration enthalpy |
Enthalpy change when 1 mole of gaseous ions becomes hydrated (dissolved in water). Exothermic. |
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Enthalpy of solution |
Enthalpy change when 1 mole of an ionic solid dissolves in an amount of water large enough so that the dissolved ions are well separated and do not interact with each other. |
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Bond dissociation enthalpy |
Enthalpy change when 1 mole of covalent bonds is broken in the gaseous state. Endothermic. |
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Lattice enthalpy of formation |
Enthalpy change when 1 mole of a solid ionic compound is formed from its constituent ions in the gas phase. Exothermic. |
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Lattice enthalpy of dissociation |
Enthalpy change when 1 mole of a solid ionic compound is broken up into it's constituent ions in the gas phase. Endothermic. |
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Enthalpy of vaporisation |
Enthalpy change when 1 mole of a liquid is turned into a gas. Endothermic. |
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Enthalpy of fusion |
Enthalpy change when 1 mole of a solid is turned into a liquid. Endothermic |