(a) Write the chemical equations that are used in

Problem 1021E

(a) Write the chemical equations that are used in calculating the lattice energy of  via a Born-Haber cycle. (b) The second ionization energy of Sr(g) is 1064 kJ/mol. Use this fact along with data in Appendix C, Figure, Figure, and Table to calculate AHfº for . The value for astatine, At, is missing in this figure. To the nearest 100 kJ>mol, what estimate would you make for the first ionization energy of At?

                                                           Step by step solution

Step 1 of 2

(a)

Born-Haber cycle for calculating lattice energy of   -

i)

Conversion of solid Sr to Sr(g) :-

ii)

Dissociation of 1/2 mol of Cl,(g) into separate gaseous  atoms.

iii)

Ionization of Sr(g);

iv)

Electron affinity of Cl(g);

v)

Combination of gaseous ions:-

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