![]() ![]() Explain the difference between the theoretically calculated. ![]() 2Over all reaction : Ca 2 (g) 2Cl (g) CaCl 2 Ca (s) Ca (g) 178.20 kJ/mol Ca (g) Ca (g) e 589.50 kJ/mol Ca (g) Ca (g) e 1145 kJ/mol- Cl 2) 2Cl (g) 244 kJ/mol - 2Cl (g) 2Cl (g) 2(-349 kJ/mol) Ca (g) 2Cl (g) CaCl (s) Lattice energy 2 Ca (s) Cl (g) 2CaCl (s) -326 kJ2ol178.20 589.50 1145 244 2(-349) Lattice energy = -326 kJ/mol 1458.7 Lattice energy = -326 kJ/mmol Lattice energy = -1784.7 kJ/molThus the lattice energy of CaCl is found to be =21784.7 kJ/mol. The theoretically calculated value for the lattice enthalpy of magnesium chloride is 2326 kJ. 2Given:Sublimation energy of calcium = 178.20 kJ/mol1st ionization energy of calcium = 589.50 kJ/mol2nd ionization energy of Ca =1145 kJ/molBond dissociation of Cl = 22 kJ/mol -Electron affinity of Cl = -349 kJ/molEnthalpy of reaction = -326 kJ\nIn order to calculate the lattice energy 1st we have to write the chemical equation for thedissociation of CaCl. ![]() As the size ofCa is lying in between Mg and Sr, the lattice energy of Ca must be expected to lie in between therange of Mg to Sr.Thus the range of lattice energy of CaCl is in be2een 2127 kJ/mol to 2326 kJ/mol.Step-2(b) Here we have to calculate the lattice energy of CaCl. You're probably well aware of how ubiquitous ionic lattices are - you'll find them in your food, medicine, and maybe even in the walls of your. Here all the atoms are having same charge and forming compounds with chlorine. Atoms can come together in many different ways, and this lattice energy calculator is concerned with the energy stored when cations and anions ionically bond as a part of a larger, uniform structure. (i) Identify the enthalpy changes labelled by I and V in. So the order of increasing atomic size of Mg, Ca and Sr areMg < Ca < Sr. The lattice enthalpy of magnesium chloride can be calculated from the Born-Haber cycle shown below. It is known that as we go down agroup, the atomic size increases. Equivalently, lattice energy can be defined as the amount of work (energy) that is released during creation of crystal lattice from ions separated to infinity. 2In this question it has been given that, the lattice energy of MgCl and SrCl2 from the t2ble 8.2 isfound to be 2326 kJ/mol and 2127 kJ/mol.Mg, Ca and Sr all are present in a same group i.e group IIA. 2Solution 30EStep-1(a)Here we have to find the range of lattice energy of CaCl. So I am going to rewrite it as a table.Problem 30E(a) Based on the lattice energies of MgCl and SrCl2given in Tab2e 8.2, what is the range ofvalues that you would expect for the lattice energy of CaCl (b) Using d2a from AppendixC, Figure 7.9, and Figure 7.11 and the value of the second ionization energy for Ca,, calculate the lattice energy of CaCl. I have drawn this cycle very roughly to scale, but that is going to become more and more difficult as we look at the other two possible formulae. 2In this question it has been given that, the lattice energy of MgCl and SrCl2 from the t2ble 8.2 isfound to be 2326 kJ/mol and 2127 kJ/mol.Mg, Ca and Sr all. After that, the question is whether Cl -349 has more lattice energy than NaCl or MgCl2. Conversely, for a given alkali metal ion, the fluoride salt always has. Because the ionic radii of the cations decrease in the order K > Na > Li for a given halide ion, the lattice energy decreases smoothly from Li to K . So the compound MgCl is definitely energetically more stable than its elements. Lattice Energies for Some Ionic Compounds TABLE 8.1 Lattice Energy (kJ/mol) Compound Lattice Energy (kJ/mol) Compound 1030 LiF MgCl2 2526 LCI 834 SrCl2. The lattice dissociation enthalpy for NaCl is 787 kJ mol-1. Figure 4.2.2 A Plot of Lattice Energy versus the Identity of the Halide for the Lithium, Sodium, and Potassium Halides. \( \newcommand\]įind two routes around this without going against the flow of any arrows. ![]()
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