Suppose a chemist discovers a new metallic element and names it "Xhaustium" (Xh). Xh exhibits chemical behaviour similar to an alkaline earth. Xh(s) + F2(g) → XhF2(s) Lattice energy for XhF2 -2140. kJ/mol First Ionization energy of Xh 310. kJ/mol Second Ionization energy of Xh 589 kJ/mol Electron affinity of F -327.8 kJ/mol Bond energy of F2 154 kJ/mol Enthalpy of sublimation (atomization) of Xh 150. kJ/mol Use the above data to calculate ΔH°f for Xhaustium fluoride. Your answer must be accurate and precise to the nearest 1 kJ/mol, as are the given parameters.

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Suppose a chemist discovers a new metallic element and names it "Xhaustium" (Xh).
Xh exhibits chemical behaviour similar to an alkaline earth.

Xh(s) + F2(g) → XhF2(s)

 

Lattice energy for XhF2 -2140. kJ/mol
First Ionization energy of Xh  310. kJ/mol
Second Ionization energy of Xh  589 kJ/mol
Electron affinity of F -327.8 kJ/mol
Bond energy of F2  154 kJ/mol
Enthalpy of sublimation (atomization) of Xh      150. kJ/mol

Use the above data to calculate Δf for Xhaustium fluoride.

Your answer must be accurate and precise to the nearest 1 kJ/mol, as are the given parameters.
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