F325 - Module 2 0.0 / 5 ? ChemistryEnergeticsEnthalpyEntropyRedoxElectrode potentialsA2/A-levelOCR Created by: schallawala100Created on: 19-03-16 15:37 Lattice enthalpy Enthalpy change that accompanies the formation of 1 mole of an ionic compound from its gaseous ions under standard conditions. 1 of 17 Enthalpy change of formation Enthalpy change when 1 mole of compound is formed from its constituent elements in standard states under standard conditions. 2 of 17 Enthalpy change of atomisation Enthalpy change when 1 mole of gaseous atoms forms from the elements in its standard state. 3 of 17 First ionisation energy Energy required to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+. 4 of 17 Second ionisation energy Energy required to remove a second electron from each ion in 1 mole of gaseous 1+ ions to give gaseous 2+ ions. 5 of 17 First electron affinity Energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions. 6 of 17 Second electron affinity Energy required to add an electron to each ion in 1 mole of gaseous 1- ions to produce 1 mole of gaseous 2- ions. 7 of 17 Enthalpy change of solution Enthalpy change when 1 mole of a compound completely dissolves in water under standard conditions. 8 of 17 Enthalpy change of hydration Enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution under standard conditions. 9 of 17 Entropy The quantitative measure of the degree of disorder of a system. 10 of 17 Entropy change of reaction Entropy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions. 11 of 17 Free energy change The balance between enthalpy, entropy and temperature for a process. 12 of 17 Oxidation Loss of electrons (increase in oxidation number). 13 of 17 Reduction Gain of electrons (decrease in oxidation number). 14 of 17 Oxidising agent A reagent that oxidises another species and is itself reduced. 15 of 17 Reducing agent A reagent that reduces another species and is itself oxidised. 16 of 17 Standard electrode potential The e.m.f measured when that metal / metal ion electrode is coupled to a hydrogen electrode under standard conditions. 17 of 17
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