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Chemical Bonding and Shapes of Molecules question

2021 · Q44
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Chemical Bonding and Shapes of Molecules question

2021 · Q44

IIT JAMChemistryChemical Bonding and Shapes of MoleculesNumerical+1 / −0
MgO crystallizes as rock salt structure with unit cell length 2.12 Å. From electrostatic model, the calculated lattice energy in kJ mol −1^{-1}−1 (rounded off to the nearest integer) is ‾\underline{\hspace{2cm}}​. (Given: NA=6.022×1023 mol−1N_{\mathrm{A}} = 6.022 \times 10^{23} \mathrm{~mol}^{-1}NA​=6.022×1023 mol−1; Madelung constant = 1.748; ε0=8.854×10−12 J−1C2 m−1\varepsilon_0 = 8.854 \times 10^{-12} \mathrm{~J}^{-1} \mathrm{C}^2 \mathrm{~m}^{-1}ε0​=8.854×10−12 J−1C2 m−1; charge of an electron = 1.602×10−19C1.602 \times 10^{-19} \mathrm{C}1.602×10−19C)
Numerical answer
View written solutionFree

Correct answer: -7880, -6150, 6150, 7880

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