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Describe a redox reaction, the changes in oxidation number and the reagents present.
A redox reaction is a reaction in which both oxidation and reduction take place. When a chemical is reduced its oxidation number decreases and when a chemical is oxidised its oxidation number increases. An oxidising reagent accepts electrons and is reduced. A reducing agent is the opposite.
Define standard electrode potential
The electromotive force of a half cell compared with a standard hydrogen half cell, measured at 298K, with 1 moldm-3 solution concentrations at 100 kpa pressure
Define Standard Lattice enthalpy
the enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions
Define Enthalpy change of formation
the enthalpy change that takes place when one mole of a compound is formed from its constituent elements in their standard states under standard conditions
Define enthalpy change of atomisation
the enthalpy change that takes place when one mole of gaseous atoms forms from the element in its standard state
Define First ionisation energy
the energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions
Define second ionisation energy
the energy required to remove one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions
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