Lattice Energy
Chemistry ⇒ Chemical Bonding and Structure
Lattice Energy starts at 11 and continues till grade 12.
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Describe how the size of ions affects the lattice energy of an ionic compound.
Describe the effect of increasing the charge on the cation in an ionic compound on its lattice energy.
Describe the effect of lattice energy on the physical properties of ionic compounds.
Describe the relationship between lattice energy and the stability of an ionic compound.
Describe the trend in lattice energy as you move down a group in the periodic table for alkali metal halides.
Explain why MgO has a much higher lattice energy than NaCl.
Explain why the lattice energy of Al2O3 is much higher than that of NaCl.
Calculate the lattice energy of NaCl using the following data (all values in kJ/mol): Enthalpy of formation of NaCl = -411, Sublimation energy of Na = 108, Ionization energy of Na = 496, Bond dissociation energy of Cl2 = 242, Electron affinity of Cl = -349. (Assume all steps are for 1 mole of NaCl.)
The lattice energy of NaCl is higher than that of KCl. This is mainly because: (1) Na+ is smaller than K+. (2) Cl- is larger than Na+. (3) K+ has a higher charge than Na+. (4) NaCl is more soluble in water than KCl.
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) CaO (3) SrO (4) BaO
Which of the following compounds is expected to have the highest lattice energy? (1) NaF (2) MgO (3) CaCl2 (4) KBr
Fill in the blank: The ________ the lattice energy, the less soluble the ionic compound tends to be in water.
Fill in the blank: The Born-Landé equation is used to calculate ________ energy of an ionic crystal.
Fill in the blank: The energy change when one mole of an ionic solid is formed from its gaseous ions is called ________ energy.
Fill in the blank: The higher the lattice energy, the ________ the melting point of the ionic compound.
True or False: Lattice energy can be measured directly in the laboratory.
True or False: Lattice energy is a measure of the strength of the forces holding the ions together in an ionic solid.
True or False: Lattice energy is always a positive value.
True or False: Lattice energy is greater for compounds with higher ionic charges and smaller ionic radii.
