Page 279 - MODERN ELECTROCHEMISTRY

ION–SOLVENT INTERACTIONS 215

14. Calculate the entropy change due to ion–solvent interaction for the ions in
Exercise 13 using the relation for water. (Kim)
15. Evaluate the heat of solvation for the ions in Exercise 13 in terms of the
ion–dipole approach (Kim)
16. Calculate the difference of the heat of hydration for the tons in Exercise 13
between the ion–quadrupole model and the ion–dipole model
D cm). (Kim)
17. Calculate the absolute heats of hydration of and using the absolute heat
of hydration of of The heat of interaction between HC1
and water is the heat of solution of NaOH is
and the heat of sublimation of NaCl is (Kim)

18. The adiabatic compressibilities of water and 0.1 M NaI solution at 298 K are
and respectively. Calculate the hydration
number of the NaI solution when the density of the solution is
(Kim)

19. The adiabatic compressibility of water at 25 °C is Calculate
the adiabatic compressibility of a 0.101 M solution of (density at 25 °C
if the hydration number of the electrolyte is 12. (Contractor)

20. Sound velocity in water is measured to be at 25 °C. Calculate the
adiabatic compressibility of water in (Xu)

21. In the text are data on compressibilities as a function of concentration. Use the
Passynski equation to calculate the total solvation number of NaBr at infinite
dilution.
22. The definition of compressibility is On the (often made but
erroneous) assumption that is constant with pressure, find V as a function of
P. Why must your equation be applicable only over a limited range of pressures?
23. Calculate the hydration number of when the mobility of the ion in water is
and the viscosity of the solution is 0.01 poise,
pm and (Kim)
24. Use the infinite-dilution equality between the accelerative force for ions under
an applied electric field and the viscous drag to calculate the hydration number
of in HC1 aqueous solution, using the result that the transport number of the
cation is 0.83, while the equivalent conductivity at infinite dilution is
(25 °C). Take the radius of water as 170 pm and the corresponding
viscosity of water as 0.01 poise.