5.2.1

Question 1

What cycle is used to calculate lattice enthalpy?

Answer 1

Born-haber cycle

Question 2

What is lattice enthalpy?

Answer 2

when 1 mole of ionic lattice is formed from it’s constituent gaseous ions

Question 3

What factors affect lattice enthalpy?

Answer 3

ionic radius
ionic charge

Question 4

What does a downwards and upwards arrow mean in a born-haber cycle?

Answer 4

upwards mean endothermic
downwards means exothermic

Question 5

What is the enthalpy change of formation?

Answer 5

energy needed to produce
1 mole of a compound
from its elements
in their standard states

Question 6

What is the enthalpy change of atomisation?

Answer 6

energy needed to produce
1 mole of a gaseous atom
from its elements
in its standard states

Question 7

What is the bond enthalpy?

Answer 7

one mole of a covalent bond broken into separate atoms in the gaseous state

Question 8

What s the 1st ionisation energy?

Answer 8

energy needed to produce
1 mole of gaseous 1+ ions
formed from gaseous atoms

Question 9

What is the 2nd ionisation energy

Answer 9

one mole of gaseous 2+ ions formed
from gaseous 1+ ions

Question 10

What is the first electron affinity?

Answer 10

one mole of gaseous 1- ions formed from gaseous atoms

Question 11

What is the 2nd electron affinity?

Answer 11

1 mole of gaseous 2- ions
formed from gaseous 1- ions

Question 12

What is lattice enthalpy?

Answer 12

one mole of ionic lattice formed
from gaseous ions

Question 13

Is the enthalpy change of formation endothermic or exothermic?

Answer 13

Exothermic

Question 14

Is the enthalpy change of atomisation endothermic or exothermic?

Answer 14

endothermic

Question 15

Is the bond enthalpy endothermic or exothermic?

Answer 15

endothermic

Question 16

Is the 1st ionisation energy endothermic or exothermic?

Answer 16

endothermic

Question 17

Is the 2nd ionisation energy endothermic or exothermic?

Answer 17

endothermic

Question 18

Is the 1st electron affinity endothermic or exothermic?

Answer 18

exothermic

Question 19

Is the 2nd electron affinity endothermic or exothermic?

Answer 19

endothermic

Question 20

Is the lattice enthalpy endothermic or exothermic?

Answer 20

exothermic

Question 21

What is the standard enthalpy change of hydration?

Answer 21

when 1 mole of gaseous ions is hydrated to form 1 mole of gaseous ions

Question 22

What is the standard enthalpy change of solution?

Answer 22

enthalpy change when 1 mole of a solute dissolves in a solvent

Question 23

Is enthalpy change of solution endothermic or exothermic?

Answer 23

exothermic or endothermic

Question 24

Is enthalpy change of hydration endothermic or exothermic?

Answer 24

exothermic

Question 25

Is enthalpy change of lattice enthalpy exothermic or endothermic?

Answer 25

exothermic

Question 26

What factors affect enthalpy of solution?

Answer 26

ionic size ionic charge

Question 27

How does the ionic size affect the enthalpy of solution?

Answer 27

smaller ions attract each other more and water more

Question 28

How does ionic charge affect the enthalpy of solution?

Answer 28

the greater the charge the greater the attraction between postive and negative ions and water