Concept explainers
Calculate the lattice energy of
Interpretation:
The lattice energy of
Concept introduction:
Lattice energy is defined as the amount of energy needed to convert a mole of a solid ionic compound to its respective gaseous ions.
The lattice energy of
Here,
Answer to Problem 20QP
Solution:
Explanation of Solution
Given information: The value of
The value of
The value of
The value of
The value of
The value of
The lattice energy of
Substitute the value
The lattice energy of themolecule
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Chapter 8 Solutions
Package: Chemistry With Aleks 360 Access Card, 2-semester
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- Compare your answers from parts a and b of Exercise 69 with H values calculated for each reaction using standard enthalpies of formation in Appendix 4. Do enthalpy changes calculated from bond energies give a reasonable estimate of the actual values?arrow_forwardThe lattice energy of LiF is 1023 kJ/mol, and the LiF distance is 201 pm. MgO crystallizes in the same structure as LiF but with a Mg—O distance of 205 pm. Which of the following values most closely approximates the lattice energy of MgO: 256 kJ/mol, 512 kJ/mol, 1023 kJ/mol, 2046 kJ/mol, or 4008 kJ/mol? Explain your choice.arrow_forwardDefine the term lattice energy. Why, energetically, do ionic compounds form? Fig. 3-8 illustrates the energy changes involved in the formation of MgO(s) and NaF(s). Why is the lattice energy of MgO(s) so different from that of NaF(s)? The magnesium oxide is composed of Mg2+ and O2 ions. Energetically, why does Mg2+O2 form and not Mg+O? Why doesnt Mg3+O3 form?arrow_forward
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