Which two factors affect lattice energy?

Which two factors affect lattice energy?

• A. Size of ions and charge of ions
• B. Temperature and pressure
• C. Mass and polarity
• D. Electronegativity and electron affinity

Answer: (B)

Lattice energy come from the strong electrostatic attraction between ions in an ionic solid. The strength of that attraction follows Coulomb’s law: it increases with higher charges on the ions and with ions being closer together. Higher charges amplify the pull between ions, and smaller ion sizes bring ions closer, both of which raise the lattice energy. So the two factors that govern lattice energy are the size of the ions and the charge of the ions. Temperature and pressure can influence the crystal’s spacing or its phase, but they don’t set the intrinsic lattice energy of the solid. Other properties like mass, polarity, electronegativity, or electron affinity don’t directly determine lattice energy in an ionic lattice.

Lattice energy come from the strong electrostatic attraction between ions in an ionic solid. The strength of that attraction follows Coulomb’s law: it increases with higher charges on the ions and with ions being closer together. Higher charges amplify the pull between ions, and smaller ion sizes bring ions closer, both of which raise the lattice energy. So the two factors that govern lattice energy are the size of the ions and the charge of the ions.

Temperature and pressure can influence the crystal’s spacing or its phase, but they don’t set the intrinsic lattice energy of the solid. Other properties like mass, polarity, electronegativity, or electron affinity don’t directly determine lattice energy in an ionic lattice.