DN) enthalpy defintions Flashcards Preview

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Flashcards in DN) enthalpy defintions Deck (18):
1

enthalpy of formation

enthalpy change when one mole of a substance is formed from its constituent elements with all substances in their standard states

2

enthalpy of combustion

enthalpy change when one mole of a substance undergoes complete combustion in oxygen with all substances in their standard states

3

enthalpy of neutralisation

enthalpy change when one mole of water is formed in a reaction between an acid and alkali under standard conditions

4

first ionisation energy

enthalpy change when each atom in one mole of gaseous atoms loses one electron to form one mole of gaseous 1+ ions

5

second ionisation energy

enthalpy change when each ion in one mole of gaseous atoms loses one electron to form one mole of gaseous 2+ ions

6

first electron affinity

enthalpy change when each atom in one mole of gaseous atoms gains one electron to form one mole of gaseous 1- atoms

7

second electron affinity

enthalpy change when each ion in one mole of gaseous 1- ions gains one electron to form one mole of gaseous 2- atoms

8

enthalpy of atomisation

enthalpy change when one mole of gaseous atoms is produced from an element in its standard state

9

hydration enthalpy

enthalpy change when one mole of gaseous ions become hydrated (dissolved in water)

10

enthalpy of solution

enthalpy change when one mole of an ionic solid dissolves in an amount of water large enough so that the dissolved ions are well separated and do not interact with each other

11

bond dissociation enthalpy

enthalpy change when one mole of covalent bonds is broken in the gaseous state

12

lattice enthalpy formation (or association)

enthalpy change when one mole of a solid ionic compound is formed from its constituent ions in the gas phase

13

lattice enthalpy of dissociation

enthalpy change when one mole of a solid ionic compound is broken up into its constituent ions in the gas phase

14

enthalpy of vaporization

enthalpy change when one mole of liquid is turned into a gas

15

enthalpy of fusion

enthalpy change when one mole of a solid is turned into a liquid

16

what is enthaply

energy change at a constant pressure

17

enthalpy change

change in heat content at constant pressure

18

circle with horizontal line through it = standard conditions

100kPa and 298k