Calculate the lattice enthalpy of `CaCl_(2)` given that the enthalpy of : i) Sublimation of Ca in `"121.8 kJ mol"^(-1)` ii) Dissociation of `Cl_(2)` to `2Cl` is `"242.8 kJ mol"^(-1)` iii) Ionisation of `Ca" to "Ca^(2+)" is 2422 kJ mol"^(-1)` iv) Electron gain for `Cl" to "Cl^(-)" is - 355 kJ mol"^(-1)` v) `DeltaH_(f)^((o))" overall is "-"795 kJ mol"^(-1)`
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