Class 11th The S-block Elements Chemistry Ncert Solutions Chemistry Class 11th

The Born-Haber cycle for KCl is evaluated with the following data:

$Δ_{f} H^{Θ} f o r K C = - 436.7 k J m o l^{- 1}; Δ_{s u b} H^{Θ} f o r K = 89.2 k J m o l^{- 1};$

$Δ_{i o n i z a t i o n} H^{Θ} f o r K = 419.0 k J m o l^{- 1}; Δ_{e l e c t r o n g a i n} H^{Θ} f o r C l_{(g)} = - 348.6 k J m o l^{- 1};$

$Δ_{b o n d} H^{Θ} f o r C l_{2} = 243.0 k J m o l^{- 1}$

The magnitude of lattice enthalpy of KCl in kJ mol^-1 is_________ (Nearest integer)

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Vishal Baghel | Contributor-Level 10

6 months ago

$Δ H_{f}^{0} = (+ Δ H_{s u b}^{0}) + (+ Δ H_{I E}^{0}) + (+ \frac{1}{2} Δ H_{B D E}^{0}) + (Δ H_{E A}^{0}) + (- Δ H_{L E}^{0})$

$Δ H_{L E}^{0} = 89.2 + 419 + 121.5 - 348.6 + 436.7 k J m o l^{- 1}$

$∴$ Lattice energy = 717.8

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Chemistry Ncert Solutions Class 11th 2023

Chemistry Ncert Solutions Class 11th 2023

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