Lattice enthalpy

• What is second ionisation energy

  the energy required for an electron to remove 1 mole of 1+ ions forming 1 mole of 2+ ions
• what type of reaction is second ionisation energy

  endothermic
• what is the second ionisation energy of magnesium

  Mg+ (g) - e- —> Mg2+ (g)
• What is lattice enthalpy

  The enthalpy change when one mole of ionic compounds Is formed from its gaseous ions under standard conditions
• what type of reaction is lattice enthalpy

  Exothermic
• what is the lattice enthalpy of MgO

  Mg2+ (g) + O2- (g) —> MgO
• what is the standard enthalpy change of atomisation

  formation of 1 mole of gaseous atoms from an element in its normal state under standard conditions
• what type of reaction is standard enthalpy change of atomisation

  endothermic
• what is the standard enthalpy change of atomisation of cl and mg

  Mg (s) —> Mg (g)

  1/2 Cl (g) —> Cl (g)
• What is first electron affinity

  The energy released when each atom in 1 mole of gaseous atoms gains an electron forming a mole of gaseous 1- ions
• what type of reaction is first electron affinity

  exothermic
• what is the first electron affinity of O

  O (g) + e- —> O- (g)
• what is the second electron affinity

  the energy needed to that each ion in 1 mole of gaseous ions to gain an electron forming 1 mole of gaseous 2 - atoms
• what type of reaction is second electron affinity

  endothermic
• what is the second electron affinity of O

  O- (g) + e- —> O2- (g)
• what is a born harber cycle

  an energy level diagram for the formation of ionic compounds
• what is the BH cycle of NaCl

  atomisation of Na = 108 kjmol-1

  atomisation of Cl = 121

  formation of NaCl = -410

  first IE of Na = 496

  first Ea Cl = -346

  lattice enthalpy of NaCl = ? 


  answer shown on image