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skyeagle3Lv1
29 Mar 2020
(a) Based on the lattice energies of MgCl2 and SrCl2 given in Table 8.2, what is the range of values that you would expect for the lattice energy of CaCl2? (b) Using data from Appendix C, Figure 7.11, Figure 7.13 and the value of the second ionization energy for Ca, 1145 kJ/mol, calculate the lattice energy of CaCl2.
(a) Based on the lattice energies of MgCl2 and SrCl2 given in Table 8.2, what is the range of values that you would expect for the lattice energy of CaCl2? (b) Using data from Appendix C, Figure 7.11, Figure 7.13 and the value of the second ionization energy for Ca, 1145 kJ/mol, calculate the lattice energy of CaCl2.
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Irving HeathcoteLv2
23 May 2020
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Related questions
Calculate the lattice energy of CaCl2 using the Born-Haber cycle and from the data below.
| Enthalpy of sublimation of Ca | 178.2 kJ/mol |
| Cl-Cl bond energy | 121.3 kJ/mol |
| 1st ionization energy of Ca | 590 kJ/mol |
| 2nd ionization energy of Ca | 1145 kJ/mol |
| Electron affinity of Cl | -349 kJ/mol |
| Enthalpy of formation of CaCl2 | -795.8 kJ/mol |
a) Rank the following ionic compounds by the magnitude of their lattice energy. Rank from highest to the lowest magnitude of lattice energy.
b) Given the following thermodynamic data, calculate the lattice energy of CaBr2(s). Express your answer as an integer, and include the appropriate units.
| Term | Value (kJ/mol) |
| ΔH∘f[CaBr2(s)] | -675 |
| ΔH∘f[Ca(g)] | 179 |
| ΔH∘f[Br(g)] | 112 |
| I1(Ca) | 590 |
| I2(Ca) | 1145 |
| E(Br) | -325 |
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