Enthalpy And Entropy Ch22

Question 1

Lattice enthalpy
Symbol

Answer 1

Enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions
It’s always exothermic

Question 2

Standard enthalpy change of atomisation

Answer 2

Enthalpy change that takes place when one mole of gaseous atoms form from their elements in their standard state

Question 3

First ionisation energy

Answer 3

Energy required to remove one electron from each atom in one mole of gaseous atoms of an element to form one mole of gaseous 1+ ions

Question 4

First electron affinity

Answer 4

Enthalpy change that takes place when one electron is added to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions

Question 5

Second electron affinity

Answer 5

Enthalpy change that occurs when one electron is added to each ion in one mole of gaseous 1- ions to form one mole of gaseous 2- ions

Question 6

Second ionisation energy

Answer 6

Energy required to remove one electron from each ion In One mole of gaseous 1+ ions of an element to form one mole of gaseous 2+ ions

Question 7

entropy

Answer 7

a measure of the dispersal of energy and disorder within the chemicals making up a system