Enthalpy and Lattice Concepts Quiz

Under what conditions are lattice enthalpies measured?

• High pressure

• Low temperature

• Standard conditions

• High temperature

What is the symbol for lattice enthalpy?

• ΔfH

• ΔdH

• ΔeH

• ΔaH

What does atomisation enthalpy involve?

• Formation of liquids

• Formation of solids

• Formation of gaseous atoms

• Formation of gases from liquids

What does the enthalpy of electron affinity involve?

• Removal of electrons

• Sharing of electrons

• Addition of electrons

• Loss of electrons

What is the enthalpy change for the hydration of Na in the example?

• +121 kJ/mol

• +502 kJ/mol

• +107 kJ/mol

• +355 kJ/mol

What is the enthalpy change for the dissociation of Cl2 in the example?

• +121 kJ/mol

• +502 kJ/mol

• +107 kJ/mol

• -355 kJ/mol

What is the definition of enthalpy of hydration?

• The enthalpy change when one mole of gaseous ions is dissolved in water to form one mole of aqueous ions under standard conditions.

• The enthalpy change when one mole of solid ions is dissolved in water.

• The enthalpy change when one mole of gaseous ions is formed from aqueous ions.

• The enthalpy change when one mole of gaseous ions is dissolved in a non-polar solvent.

What is the significance of the d+ region in water?

• It attracts -ve ions.

• It repels -ve ions.

• It attracts +ve ions.

• It repels +ve ions.

What is the role of size in the perfect ionic model?

• It influences hydration enthalpy.

• It determines the color of the ions.

• It affects the temperature of the solution.

• It changes the pH of the solution.

What is the relationship between disorder and entropy?

• More disorder, lower entropy

• More disorder, greater entropy

• Less disorder, greater entropy

• Disorder does not affect entropy