AQA Unit 5 Chemisty Definitions ( Extra Special)
- Created by: Prem Pithia
- Created on: 05-06-13 18:59
GLOSSARY OF USEFUL TERMS FOR UNIT 5
Enthalpy of Formation: enthalpy change when one mole of a compound is formed from its constituent elements. All reactants and products in their standard states.
First Ionisation Enthalpy: The standard enthalpy change when one mole of electrons is removed from one mole of gaseous atoms which is therefore converted to one mole of gaseous ions, each with a single positive charge.
Second Ionisation Enthalpy:The standard enthalpy change is when one mole of electrons is removed from one mole of gaseous ions with a single positive charge which is therefore converted to one mole of ions with two positive charges,
Enthalpy of Atomisation of an Element :The enthalpy change that accompanies the formation of one mole of gaseous atoms from the element in its standard state, under standard conditions.
Enthalpy of Atomisation of a Compound: enthalpy change when one mole of a compound in its standard state is converted into free gaseous atoms
First Electron Affinity:The standard enthalpy change when one mole of electrons is added to one mole of gaseous atoms which is converted to one mole of gaseous ions, each with a single negative charge
Second Electron Affinity: The enthalpy change when one mole of electrons is added to one mole of gaseous ions with a single negative charge, to form one mole of ions with two negative charges.
Bond Dissociation Enthalpy:The enthalpy change when one mole of gaseous molecules each breaks a covalent bond to form two free radicals
Lattice Enthalpy of Formation: Enthalpy change when one mole of an ionic compound is formed from its constituent gaseous ions
Lattice Dissociation Enthalpy: Enthalpy change when one mole of an ionic compound is completely dissociated into its constituent gaseous ions
Enthalpy of Hydration: Enthalpy change when one mole of gaseous ions is added to an excess of water
Enthalpy of Solution: Enthalpy change when one mole of an ionic compound is completely dissolved in an excess of water
Entropy: a measure of the degree of disorder in…
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