born håber cycles

Question 1

define lattice enthalpy

Answer 1

the energy released when one mole of an ionic solid compound in its standard state is formed from its constituent gaseous ions starting infinitely far apart

Question 2

define enthalpy of formation

Answer 2

enthalpy change when 1 mole of a substance is formed from its elements in their standard states under standard conditions 298K 100 KPa

Question 3

define enthalpy of atomisation

Answer 3

energy required to produce 1 mole of gaseous atoms from the element in its standard state 100KPa 298K

Question 4

define first electron affinity

Answer 4

energy required to produce 1 mole of gaseous ions with a 1- charge by adding 1 mole of electrons to one mole of gaseous atoms

Question 5

define first ionisation energy

Answer 5

energy required to remove one mole of electrons from one mole of gaseous atoms

Question 6

define second ionisation energy

Answer 6

energy required to remove one mole of electrons from one mole of gaseous 1+ ions to form one mole of 2+ ions

Question 7

what is a born haber cycle

Answer 7

an enthalpy cycle/hess cycle composed of all the enthalpy changes in the steps involved in the formation of 1 mole of ionic compound from its constituent elements in their standard states.