Concept explainers
Interpretation:
The compound expected to have greater lattice energy among
Concept Introduction:
A three-dimensional array of ions constitutes the ionic compound lattice. They are stabilized because of attractive forces oppositely charged ions that lower the potential energy. The lattice energy of strong ionic solids is often very large because of small and densely charged ions.
Lower is the potential energy of interaction and more stable is the ionic solid. Hence the compounds that have high charge density on small space are the most stable ionic solids. For example, the calcium phosphate is made up of
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ACHIEVE/CHEMICAL PRINCIPLES ACCESS 1TERM
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- Using the standard enthalpy of formation data in Appendix G, calculate the bond energy of the carbon-sulfur double bond in CS2.arrow_forwardWrite all resonance structures of chlorobenzene, C6H5Cl, a molecule with the same cyclic structure as benzene. In all structures, keep the CCl bond as a single bond. Which resonance structures are the most important?arrow_forwardUsing the bond energy data from your text (or the internet), determine (show calculations for) the approximate enthalpy change , ∆H, for each of the following reactions: (a) Cl2 (g) + 3F2 (g) ⟶ 2ClF3 (g) (b) H2C=CH2 (g) + H2 (g) ⟶ H3CCH3 (g)arrow_forward
- Which compound in each of the following pairs has the larger lattice energy? Note: Mg2+ and Li+ have similar radii; O2– and F– have similar radii. Explain your choices.(a) MgO or MgSe(b) LiF or MgO(c) Li2O or LiCl(d) Li2Se or MgOarrow_forwardBe sure to answer all parts.Using the periodic table only, arrange the members of each of the following sets in order of increasing bond strength:(a) Br―Br, Cl―Cl, I―I (b) S―H, S―Br, S―Clarrow_forwardUse the Born-Haber cycle to calculate the lattice energy of KF. [The heat of sublimation of K is 91.6 kJ·mol−1 and ΔfH(KF) = −567.3 kJ·mol−1. Bond enthalpy for F2 is 158.8 kJ·mol−1. Other data may be found in the Ionization Energies Table and the Electron Affinities Table.]arrow_forward
- 2. Please list the following salts in order of increasing lattice energy and justify your answer: LiF, CaO, RbCI, AIN, CSI.arrow_forwardWrite electron configurations and Lewis structures for each element. Indicate which of the electrons in the electron configuration are shown in the Lewis structure.(a) Ca(b) Ga(c) As(d) Iarrow_forwardUse principles of atomic structure to answer each of the following: (1] (a) The radius of the Ca atom is 197 pm; the radius of the Ca2* ion is 99 pm. Account for the difference. (b) The lattice energy of CaO(s) is –3460 kJ/mol; the lattice energy of K20 is –2240 kJ/mol. Account for the difference. (c) Given these ionization values, explain the difference between Ca and K with regard to their first and second ionization energies. Element First lonization Energy (kJ/mol) Second lonization Energy (kJ/mol) K 419 3050 Ca 590 1140 (d) The first ionization energy of Mg is 738 kJ/mol and that of Al is 578 kJ/mol. Account for this difference.arrow_forward
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