Page 282 - MODERN ELECTROCHEMISTRY

218 CHAPTER 2

usual to neglect the translational entropy? (Give a numerical answer involving
the free volume of in water to this part of the question.)
5. Calculate the heats of interaction between individual ions and water: (a)
using the experimental values of the
heats of interaction between a salt and water, at 25 ºC (the Born model
is considered valid). (Constantinescu)

6. Calculate the ion–water interaction for using the ion-dipole model at 298 K.
Use four coordination. (Contractor)

7. Calculate and for AgCl, AgBr, and AgI and rationalize their low
solubility (using the data in Table P.1). (Xu)
8. Calculate at 298 K. The ionic radius of is 1.81 Å. The dielectric
constant of water at three temperatures is (20°C) = 80.1, (25°C) = 78.3,
(30°C) = 76.54. Use the Born model. (Contractor)

9. Estimate the error introduced by ignoring the size of the solvent molecules in
calculating the heat of the Born–charging process of a ion interaction with
water–water (Contractor)
10. Estimate the error introduced in calculating the heat of an NaBr interaction with

11. (a) Using data for solution enthalpy and lattice enthalpy (see
Table P.2), calculate the hydration heat for various alkali halide om-
ment on the possible major error source, (b) Using the cation radii data, explain