570437
Description
Flashcards by sophie.holland96, updated more than 1 year ago
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Created by sophie.holland96
almost 11 years ago
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| Question | Answer |
| Define lattice enthalpy | the enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions |
| Define the enthalpy change of atomisation | The enthalpy change that takes place when one mole of gaseous atoms is formed form its element in its standard state. |
| Define standard enthalpy change of formation | the enthalpy change that accompanies the formation of 1 mole of compound from its constituent elements in their standard states under standard conditions |
| Define second ionisation energy | the enthalpy change that accompanies the removal of one electron from each ion in one mole of 1+ gaseous ions to form 1 mole of gaseous 2+ ions. |
| Define 1st electron affinity | the enthalpy change accompanying the addition of one electron to each atom in 1 mole of gaseous atoms to form 1 mole of gaseous 1- ions. |
| Define standard enthalpy change of solution | The enthalpy change that takes place when one mole of compound is completely dissolved in water under standard conditions |
| Define standard entropy change of reaction | The entropy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, and with all reactants and products being in their standard states. |
| Define first ionisation energy | the enthalpy change that accompanies the removal of one electron from each atom in one mole of gaseous atoms to form 1 mole of gaseous 1+ ions. |
| Define standard enthalpy change of hydration | the enthalpy change that takes place when one mole of isolated gaseous ions is dissolved in water to form 1 mole of aqueous ions, under standard conditions. (P.S. this definition regularly comes up in exam papers along with lattice enthalpy) |
| Define oxidation | Loss of electrons |
| Define 2nd electron affinity | the enthalpy change accompanying the addition of one electron to each ion in 1 mole of gaseous 1- ions to from 1 mole of gaseous 2- ions. |
| What are the standard conditions? | 298K 100kPa / 1atm 1 mol/dm^3 concentrations |
| Define entropy, S. | the quantitative measure of the degree of disorder in a system. ( -S = less disorder/more order and +S= more disorder) |
| Define reduction | The gain of electrons |
| Define standard electrode potential | The emf of a half cell compared with a standard hydrogen half cell, measured under standard conditions (298K, solution concentrations of 1 mol/dm^3, 100kPa) |
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