____________________________
Sublimation of Cu: 55 kJ/mol |
First Ionization Energy of Cu: 840 kJ/mol |
Sublimation of Au: 43 kJ/mol |
Second Ionization Energy of Cu: 1240 kJ/mol |
Bond Dissociation of Cl2: 244 kJ/mol |
First Ionization Energy of Au: 940 kJ/mol |
Electron Affinity of Cl2: -349 kJ/mol |
Second Ionization Energy of Au: 1790 kJ/mol |
Lattice Energy of AuCl: -1455 kJ/mol |
Lattice Energy of CuCl: -997 kJ/mol |
Lattice Energy of AuCl2: -3055 kJ/mol |
Lattice Energy of CuCl2: -2008 kJ/mol |
Use the above data to calculate the enthalpy of formation of solid gold (I) chloride. You must write the thermochemical steps for each step of the cycle, as well as draw a Born-Haber Diagram.
____________________________ Sublimation of Cu: 55 kJ/mol First Ionization Energy of Cu: 840 kJ/mol Sublimation of Au:...
Consider the following information. The lattice energy of LiCl is ΔH lattice = −834 kJ/mol. The enthalpy of sublimation of Li is ΔH sub = 159.3 kJ/mol. The first ionization energy of Li is IE 1 = 520 kJ/mol. The electron affinity of Cl is ΔH EA = -349 kJ/mol. The bond energy of Cl2 is BE = 243 kJ/mol. Determine the enthalpy of formation, ΔHf, for LiCl(s).
Consider the following information. The lattice energy of NaCl is ΔH lattice=−788 kJ/mol The enthalpy of sublimation of Na is ΔHsub=107.5 kJ/mol The first ionization energy of Na is IE1=496 kJ/mol. The electron affinity of Cl is ΔHEA=−349 kJ/mol. The bond energy of Cl2 is BE=243 kJ/mol. Determine the enthalpy of formation, ΔHf, for NaCl(s). ΔHf= kJ/mol
1
2. for molecules CS2 and CH3F
a.describe its lewis structure
b.the kind of orbitals used by the central atoms to bond
c.polarity
d.approximate geometry
3.explain the formation of sigma and phi bonds in the
XeO3.molecule illustrate its structure and explain its
polarity
4.explain why
a. melting point NaF> NaCl but CF4 <CCl4
b. Boiling point HF> HCl but CF4 <CCl4
a. One of the properties of ionic compounds is hard but brittle. Briefly explain why? b. The data is...
Consider the following information. • The lattice energy of NaCl is AHlattice = –788 kJ/mol. • The enthalpy of sublimation of Na is AHsub = 107.5 kJ/mol. • The first ionization energy of Na is IE1 = 496 kJ/mol. • The electron affinity of Cl is AHEA = -349 kJ/mol. • The bond energy of Cl, is BE = 243 kJ/mol. Determine the enthalpy of formation, AHf, for NaCl(s). AH= kJ/mol
Consider the following information. • The lattice energy of KCl is AHlattice = -701 kJ/mol. • The enthalpy of sublimation of K is AHsub = 89.0 kJ/mol. • The first ionization energy of K is IE1 = 419 kJ/mol. • The electron affinity of Cl is AHEA = -349 kJ/mol. • The bond energy of Cl, is BE = 243 kJ/mol. Determine the enthalpy of formation, AHf, for KCl(s). AHư= kJ/mol
Calculate the lattice energy for LiF(s) given the following: sublimation energy for Li(s) = +166 KJ/mol delta Hf for F(g) = +77 KJ/mol first ionization energy of Li(g) = +520 KJ/mol electron affinity of F(g) = -328 KJ/mol enthalpy of formation of LiF(s) = -617 KJ/mol
Find the experimental lattice energy of Magnesium Chloride (MgCl2) using a Born-Haber cycle. Draw the Born-Haber cycle and indicate the involved steps of the cycle. Label the cycle carefully. Some information that might be useful. Electron affinity of Cl:EA1 = -348.6kJ/mol, EA2 = +750kJ/mol. Heat of sublimation for Magnesium = 147.7 kJ/mol, Bond Dissociation Energy of Cl2 = 242 kJ/mol, Lattice energy due to electrostatic interactions in MgCl2 = -2524 kJ/mol. Ionization energy of Mg: Ei2 = 1451 kJ/mol.
Calculate the lattice energy of CaBr2. The standard heat of formation of CaBr2 is -675 kJ/mol. The first ionization energy of Ca is 590 kJ/mol and its second ionization energy is 1145 kJ/mol. The heat of sublimation of Ca[Ca(s)→Ca(g)] is 178 kJ/mol. The bond energy of Br2 is 193 kJ/mol, the heat of vaporization of Br2(l) is 31 kJ/mol, and the electron affinity of Br is -325 kJ/mol.
Born-Fajans-Haber Cycle Suppose a chemist discovers a new metallic element and names it "Xtrinsium" (Xt) Xt exhibits chemical behaviour similar to an alkaline earth Xt(s) + Cl2(g) → XtCl2(s) Lattice energy for XtCl2 First Ionization energy of Xt Second Ionization energy of Xt Electron affinity of Cl Bond energy of Cl2 Enthalpy of sublimation (atomization) of Xt 2260. kJ/mol 430. kJ/mol 731 kJ/mol -348.7 kJ/mol 239 kJ/mol 170. kJ/mol Use the above data to calculate ΔHof for Xtrinsium chloride.