Skip to main content
A

Alycia Zemlak

Feb 20, 2025

determine lattice energy given this information?

The enthalpy of formation of MX2 is ΔHf° = –759 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 111 kJ/mol. The first and second ionization energies of M are IE1 = 687 kJ/mol and IE2 = 1374 kJ/mol. The electron affinity of X is ΔHEA = –325 kJ/mol. The bond energy of X2 is BE = 191 kJ/mol.I've looked up tutorials and I followed the steps but they don't give me the right answer.
0
Save

1 Answers

P
Use Born-Haber(-Fajans) Cyclehttp://en.wikipedia.org/wiki/Born%E2%80%93Haber_cy...M(s) + X2(g) → MX2(s) ΔHf° = -759kJ mol^-1M(s) →ΔHsub(M)→M(g) = 111 kJ mol^-1M(g) →ΔHIE1(M)→ M^+ + e⁻ 687 kJ mol^-1M^+→ΔHIE2(M)→ M^2+ + e⁻ 1374 kJ mol^-1 X2 →ΔHBE(X2)→ 2X 191X + e⁻→ΔHEA1(X)→X^- -141 kJ mol^-1ΔHf° = U + ΔHsub(M) + IE1(M) + IE2(M) + ΔHdiss(F2) + 2× EA1(X) -759 = U + 111 + 687 + 1374 + 191 – 2× 325 U = -759 -111 -687 -1374 -191 + 650 = -2472 kJ mol^-1-ve sign usually dropped; should only be three sig figs... Show More
0

Want to answer this question?

Join our community to share your knowledge!

Log in Sign up

Categories

Tags

Related Questions

3
Determine [OH] of solution?

Determine [OH] of solution that is .120 M in CO3^2-. Determine pH of this solutionDetermine pOH of this solutionPlease h...

3
Determine the cell notation for the redox reaction given below.

Determine the cell notation for the redox reaction given below.

1
Determine the coordinate of the center of gravity of the three coins.?

Three identical coins lie on three corners of a square 10.0cm on a side.

2
Determine the density of a unknown liquid by Pycnometer method? Volume of Pycnometer?

a STUDENt collected the following date to determine the density of an unknown liquid by the pycnometer method:Mass of dr...

3
Determine the density of nh3 gas at 435k and 1.00atm

Determine the density of nh3 gas at 435k and 1.00atm

3
4
Determine the formal charge on each atom in each of the following molecules or ions.?

Determine the formal charge on each atom in each of the following molecules or ions.(a) SCO S C O_(b) NO3- (nitrate ion)...

1
Determine the freezing point of a solution that contains 78.8 g of naphthalene (C10H8, molar mass = 128.16 g/mol) dissolved in 722

Determine the freezing point of a solution that contains 78.8 g of naphthalene (C10H8, molar mass = 128.16 g/mol) dissol...

5
5