The lattice energy (numerical value) of alkal | vedclass

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Question

(A) Lattice energy is the energy released when gaseous ions combine to form one mole of an ionic solid. According to Coulomb's law,the lattice energy

Vedclass · Accepted Answer

$LiCl > NaCl > KCl > RbCl > CsCl$

Vedclass · Answer

(A) Lattice energy is the energy released when gaseous ions combine to form one mole of an ionic solid. According to Coulomb's law,the lattice energy is inversely proportional to the inter-ionic distance $(r_c + r_a)$. As the size of the alkali metal cation increases from $Li^+$ to $Cs^+$,the inter-ionic distance increases,leading to a decrease in the lattice energy. Therefore,the order of lattice energy for alkali metal chlorides is $LiCl > NaCl > KCl > RbCl > CsCl$.

The lattice energy (numerical value) of alkali metal chlorides is in the order:

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