Question

lattice enthalpy can be defined as the δh associated with the separation of a solid crystal into gaseous ions. lattice enthalpies for four compounds are given in the table. which of the following statements about lattice enthalpy is consistent with the information in the table? a it increases with the increasing radii of the ions in the compound. b it increases with the decreasing radii of the ions in the compound. c it increases with the decreasing charge of the ions. d it increases with the decreasing electronegativity of the atoms. compound lattice enthalpy (kj/mol) lif 1030 licl 834 mgcl₂ 2510 srcl₂ 2127

Explanation:

Lattice enthalpy is related to the strength of the ionic - ionic interactions in a solid crystal. According to Coulomb's law, the force of attraction between ions is inversely proportional to the distance between them (ionic radii). Smaller ionic radii lead to stronger attractions and higher lattice enthalpies. So, lattice enthalpy increases with the decreasing radii of the ions in the compound.

Answer:

B. It increases with the decreasing radii of the ions in the compound