AQA Unit 5 Chemisty Definitions ( Extra Special)

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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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mohz


Just hoping its got ALL unit 5 definitions from AQA. i'll check anyways & thanks! :) 

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