TABLE 5.4Lattice Energies of Halides and OxidesAnionCationFCl- Br0²-Li+10308347887302799Na+910769732682 2481K+8087016716322238Rb+7746806516172163Cs+744657632бо0Mg²+2913 2326 2097 19443795Са2+2609 2223 2132 19053414Sr2+2476 2127 2008 19373217Ba2+2341 2033 1950 18313029Fe2+2769 2525 2464 23823795Fe3+5870 5364 5268 5117 14 309 Use data from the Table 5.4, and the following information to calculate the overall energy changes for the formation of CaCl and CaCl2.Sublimation enthalpy of Ca = 178 kJ/mol, Cl, bond energy = 240 kJ/mol, lattice energy for CaCI (estimated) = 720 kJ/mol.CaClikJ/molCaCl2 ikJ/mol

Ans) 1) ΔH˚f (CaCl) = 1257.9 kJ/mol 2) ΔHfo (CaCl2) = 796 kJ / mol

Use data from the Table 5.4, and the following information to calculate the overall energy changes for the formation of CaCl and CaCl2. Sublimation enthalpy of Ca = 178 kJ/mol, Cl2 bond energy = 240 kJ/mol, lattice energy for CaCI (estimated) = 720 kJ/mol. CaCl i kJ/mol CaCl2 i kJ/mol

Use data from the Table 5.4, and the following information to calculate the overall energy changes for the formation of CaCl and CaCl2. Sublimation enthalpy of Ca = 178 kJ/mol, Cl2 bond energy = 240 kJ/mol, lattice energy for CaCI (estimated) = 720 kJ/mol. CaCl i kJ/mol CaCl2 i kJ/mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

Question

TABLE 5.4
Lattice Energies of Halides and Oxides
Anion
Cation
F
Cl- Br
0²-
Li+
1030
834
788
730
2799
Na+
910
769
732
682 2481
K+
808
701
671
632
2238
Rb+
774
680
651
617
2163
Cs+
744
657
632
бо0
Mg²+
2913 2326 2097 1944
3795
Са2+
2609 2223 2132 1905
3414
Sr2+
2476 2127 2008 1937
3217
Ba2+
2341 2033 1950 1831
3029
Fe2+
2769 2525 2464 2382
3795
Fe3+
5870 5364 5268 5117 14 309

Use data from the Table 5.4, and the following information to calculate the overall energy changes for the formation of CaCl and CaCl2.
Sublimation enthalpy of Ca = 178 kJ/mol, Cl, bond energy = 240 kJ/mol, lattice energy for CaCI (estimated) = 720 kJ/mol.
CaCl
i
kJ/mol
CaCl2 i
kJ/mol

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