Lattice Energy
Chemistry ⇒ Chemical Bonding and Structure
Lattice Energy starts at 11 and continues till grade 12.
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Arrange the following compounds in order of increasing lattice energy: NaCl, KCl, MgO.
Describe how the lattice energy of an ionic compound can be estimated using the Born-Haber cycle.
Describe the Born-Haber cycle and its use in determining lattice energy.
Describe the effect of lattice energy on the solubility of ionic compounds in water.
Explain how the size of ions affects the lattice energy of an ionic compound.
Explain why lattice energy is considered an exothermic process when forming an ionic solid from gaseous ions.
Calculate the lattice energy of an ionic compound if the enthalpy of formation is −800 kJ/mol, the ionization energy is +500 kJ/mol, the electron affinity is −300 kJ/mol, and the sublimation energy is +200 kJ/mol. (Assume all other steps sum to zero.)
Calculate the lattice energy of NaCl if the energy required to form Na+(g) is +496 kJ/mol, the energy to form Cl−(g) is −349 kJ/mol, and the enthalpy of formation of NaCl(s) is −411 kJ/mol. (Assume all other steps sum to zero for simplicity.)
Lattice energy is usually expressed in which unit? (1) Joules (2) Calories (3) kJ/mol (4) atm
Which factor does NOT affect lattice energy? (1) Ionic radii (2) Ionic charges (3) Temperature (4) Arrangement of ions in the lattice
Which of the following best defines lattice energy? (1) The energy required to form one mole of an ionic solid from its gaseous ions (2) The energy released when one mole of an ionic solid is formed from its constituent elements in their standard states (3) The energy required to break one mole of an ionic solid into its gaseous ions (4) The energy required to melt one mole of an ionic solid
Which of the following compounds has the lowest lattice energy? (1) MgO (2) NaCl (3) KBr (4) CaF2
The Born-Landé equation is used to calculate ______ energy.
The lattice energy of an ionic compound is a measure of the ______ of the ionic bonds in the solid.
The lattice energy of an ionic compound is directly proportional to the product of the ______ of the ions.
The lattice energy of an ionic compound is inversely proportional to the ______ between the ions.
State whether the following statement is true or false: Lattice energy can be measured directly in the laboratory.
State whether the following statement is true or false: Lattice energy is the energy required to convert one mole of an ionic solid into its gaseous ions.
True or False: Lattice energy increases as the charge on the ions increases.
True or False: Lattice energy is always a positive value.
