Lattice Enthalpy

Chemistry ⇒ Thermochemistry and Energetics

Lattice Enthalpy starts at 12 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Lattice Enthalpy. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 12

Describe how the Born-Haber cycle applies Hess's law to determine lattice enthalpy.

Describe the difference between lattice enthalpy of formation and lattice enthalpy of dissociation.

Describe the steps involved in the Born-Haber cycle for the formation of NaCl.

Explain the effect of increasing ionic charge on lattice enthalpy, giving an example.

Explain why lattice enthalpy is not measured directly but calculated using the Born-Haber cycle.

Explain why the lattice enthalpy of Al₂O₃ is much higher than that of NaCl.

Calculate the lattice enthalpy of KCl using the following data (all values in kJ mol^-1): Enthalpy of formation of KCl = -436, Sublimation of K = +89, Ionization energy of K = +419, Bond dissociation of Cl₂ = +242, Electron affinity of Cl = -349.

Calculate the lattice enthalpy of NaCl using the following data (all values in kJ mol^-1): Enthalpy of formation of NaCl = -411, Sublimation of Na = +108, Ionization energy of Na = +496, Bond dissociation of Cl₂ = +242, Electron affinity of Cl = -349. (Assume all steps are for 1 mole of NaCl.)

Fill in the blank: The lattice enthalpy of NaCl is _______ kJ mol^-1 (choose the closest value): (1) -787 (2) -411 (3) -234 (4) -1000

Lattice enthalpy is always: (1) Positive (2) Negative (3) Zero (4) Variable

Which of the following compounds has the highest lattice enthalpy? (1) NaF (2) NaCl (3) NaBr (4) NaI

Which of the following compounds has the lowest lattice enthalpy? (1) NaBr (2) KBr (3) RbBr (4) CsBr

Fill in the blank: The greater the magnitude of lattice enthalpy, the _______ the ionic bond.

Fill in the blank: The lattice enthalpy of ionic compounds generally _______ down a group in the periodic table.

Fill in the blank: The lattice enthalpy of MgO is _______ than that of NaCl.

Fill in the blank: The lattice enthalpy of NaCl is _______ kJ mol^-1 (choose the closest value): (1) -787 (2) -411 (3) -234 (4) -1000

State whether the following statement is true or false: Lattice enthalpy is always exothermic.

State whether the following statement is true or false: Lattice enthalpy is the same as enthalpy of formation.

State whether the following statement is true or false: The higher the charge on the ions, the higher the lattice enthalpy.

The Born-Haber cycle is used to calculate lattice enthalpy. State True or False.