Lattice Energy - Born Haber Cycle

Given the Born-Haber cycle below, which of the following enthalpy change is not represented by steps a-g

• Enthalpy of formation

• enthalpy of atomization of calcium

• 1st electron affinity of bromine

• 2nd electron affinity of bromine

Identify the enthalpy change represented by letter g.

• enthalpy of formation

• enthalpy lattice of formation

• electro affinity of bromine

• enthalpy of atomization of zinc

Calculate the enthalpy change represented by X

• +695kJ/mol

• -695kJ/mol

• -635kJ/mol

• -635kJ/mol

What is value of the enthalpy change of lattice energy for NaCl(s)?

• +766

• +230

• -230

• -766

The enthalpy of formation is the enthalpy change

• when one mole of the pure compound is formed from its elements under standard conditions

• when 1 mole of pure substance is completely burned in excess oxygen, under the given temperature and pressure of the reaction

• when 1 mole of H⁺ (aq) ions from acid reacts with 1 mole of OH^- (aq) ions from an alkali to form 1 mole of water under the stated condition of the experiment

• the magnitude of the enthalpy change of a chemical reaction depends only on the difference in the enthalpy content of the products and the reactants, and does not on how the reaction is completed

The enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions. This is the enthalpy of.....

• Combustion

• Formation

• Lattice breaking

• Ionisation

The enthalpy change when 1 mole of aqueous ions is formed from gaseous ions

• Formation

• Combustion

• Hydration

• Lattice breaking

The enthalpy change when 1 mole of 1+ ions is formed from 1 mole of gaseous atoms.

• Lattice breaking

• Atomisation

• Ionisation

• Formation

Mg (s) --> Mg (g)

• Ionisation

• Combustion

• Formation

• Atomisation

Cl (g) + e- --> Cl- (g)

• Ionisation

• Electron Affinity

• Combustion

• Formation