Problem: ​Use the following data for magnesium fluoride to estimate ΔE for the reaction:            Mg(s) + F 2 (g) → MgF2 (s)                    ΔE = ?Lattice energy                                            -2913 kJ/molFirst ionization energy of Mg                      735 kJ/molSecond ionization energy of Mg               1445 kJ/molElectron affinity of F                                   -328 kJ/molBond energy of F2                                       154 kJ/molEnergy of sublimation for Mg                     150. kJ/mol​

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FREE Expert Solution

Acc. to the Born-Haber cycle, ΔE of MgF2 can be estimated as:  


ΔE= ΔHsub + IE1+2 + ΔHdiss + 2EA + ΔU

ΔE = 150 + 735 + 1445 + 154 - (2)328 - 2913

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Problem Details

Use the following data for magnesium fluoride to estimate ΔE for the reaction:

            Mg(s) + F 2 (g) → MgF2 (s)                    ΔE = ?
Lattice energy                                            -2913 kJ/mol
First ionization energy of Mg                      735 kJ/mol
Second ionization energy of Mg               1445 kJ/mol
Electron affinity of F                                   -328 kJ/mol
Bond energy of F2                                       154 kJ/mol
Energy of sublimation for Mg                     150. kJ/mol

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Born Haber Cycle concept. You can view video lessons to learn Born Haber Cycle. Or if you need more Born Haber Cycle practice, you can also practice Born Haber Cycle practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ichire's class at DU.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.