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Estimate the lattice energy of CaCO3 if ...

Estimate the lattice energy of `CaCO_3` if `r_(ca^+) =114 pm` and `r_(CO_3^(2-) =185 p m`.

Text Solution

Verified by Experts

By usign Kapustinskil equation ,
`U =- 121,000 ((vz_1z_2)/d) ( - ( 34.5)/d)` kJ //mol
`( v =2, z_2 =-2 , d= gamma^+ =gamma^-`
` =114 + 185 =299 p m)`
`U8 =- 121,000 xx ((2xx2xx(-2))/(299)) (1- ( 32 .5)/(299))`
`=2860` kJ //mol.
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