Born Haber Cycle

Born Haber Cycle

By Angela Toh

Multiple Choice

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

Multiple Choice

Which of the equation below refers to the standard enthalpy of formation, ΔH_f^o?

• Na(g) ---> Na⁺(g) + e^- ΔH = -364 kJmol^-1

• C₂H₅OH (l) + 3O₂ (g) ---> 2 CO₂(g) + 3H₂O (l) ΔH = - 1286 kJmol^-1

• 2C (s) + 2H₂ (g) ---> C₂H₄ (g) ΔH = - 52.3 kJmol^-1

• Na⁺(g) ---> Na⁺(aq) ΔH = - 364 kJmol^-1

Multiple Choice

Diagram below shows

• Standard lattice enthalpy
• Standard enthalpy of precipitation
• Standard enthalpy of formation
• Standard enthalpy of hydration

Multiple Choice

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

• Lattice breaking

• Atomisation

• Ionisation

• Formation

Multiple Choice

Mg (g) --> Mg+ (g) + e-

• Ionisation

• Combustion

• Formation

• Hydration

Multiple Choice

Mg (s) --> Mg (g)

• Ionisation

• Combustion

• Formation

• Atomisation

Multiple Choice

Which equation represents the process that occurs when the standard enthalpy of atomisation of iodine is measured?

• ½ I₂ (s) → I (g)

• I₂ (s) → 2I (g)

• ½ I₂ (g) → I (g)

• I₂ (g) → 2I (g)

Multiple Choice

First electron affinity of an element is usually ________ and second electron affinity is ____________.

• exothermic, endothermic.

• exothermic, exothermic.

• endothermic, endothermic.

• endothermic, exothermic.

Multiple Choice

Identify the enthalpy change represented by letter g.

• Enthalpy of formation

• Enthalpy lattice of formation

• Electron affinity of bromine

• Enthalpy of atomisation of zinc

Multiple Choice

What enthalpy change does the number 4 represent?

• Formation

• 1^st ionisation energy of Na

• 1^st electron affinity of Na

• Atomisation of Na

Multiple Choice

Enthalpy change is represented by step y ?

• Enthalpy of formation calcium bromide

• Enthalpy of atomisation of calcium

• 1^st electron affinity of bromine

• Enthalpy of atomisation of bromine

Multiple Choice

Calculate the enthalpy change represented by X

• +695kJ/mol

• -695kJ/mol

• -635kJ/mol

• -635kJ/mol