What is the NaCl lattice energy content?

The correct answer is NaCl lattice energy content is 788 KJ mol-1.

Key Points

• The lattice energy of NaCl is approximately 788 KJ mol-1, which is a measure of the strength of the bonds in an ionic compound.
• Lattice energy is defined as the energy required to separate one mole of a solid ionic compound into its gaseous ions.
• High lattice energy indicates a strong attraction between the ions in a compound, contributing to high melting and boiling points.
• NaCl, or table salt, forms a crystalline structure where each Na⁺ ion is surrounded by six Cl^- ions and vice versa.
• Lattice energy values are derived from the Born-Haber cycle, a theoretical model used to analyze the formation of ionic compounds.

Additional Information

• Born-Haber Cycle
  • The Born-Haber cycle is a thermodynamic cycle used to calculate lattice energy by combining enthalpy changes associated with the formation of an ionic solid from its constituent elements.
  • It incorporates ionization energy, electron affinity, and enthalpy of sublimation, among other factors.
• Ionic Compounds
  • Ionic compounds consist of positively charged cations and negatively charged anions held together by electrostatic forces.
  • Examples include NaCl, MgO, and CaF₂.
• Factors Affecting Lattice Energy
  • The magnitude of lattice energy depends on the charge and size of the ions: higher charges and smaller ionic radii result in greater lattice energy.
  • Lattice energy also affects the solubility, hardness, and melting point of ionic compounds.
• Applications of NaCl
  • NaCl is widely used in food seasoning and preservation, de-icing roads, and in the chemical industry for the production of chlorine and sodium hydroxide.
  • It is also used in water softening processes and as a raw material in various industrial processes.