KCl has larger lattice energy as compared to RbCl because K⁺ is smaller in size as Rb⁺.
What is Lattice Energy ?
Lattice energy is the amount of energy released during the formation of solid ionic compound from its gaseous ions.
What is the trend of lattice energy ?
When we go down the group the ionic radii increases and lattice energy decreases. From left to right in a period the charge on ion increases and the lattice energy increases.
Lattice energy ∝ [tex]\frac{\text{Charge on ion}}{\text{Size of ion}}[/tex]
So the order of lattice energy is RbCl < KCl.
Thus, from above conclusion we can say that KCl has larger lattice energy as compared to RbCl because K⁺ is smaller in size as Rb⁺.
Learn more about the Lattice energy here: https://brainly.com/question/25682087
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