- 4 12 Water Vapor Is A Polar Gas Whose Dielectric Constant Exhibits An Appreciable Tem Perature Dependence The Followin 1 (314.01 KiB) Viewed 24 times
4.12 Water vapor is a polar gas whose dielectric constant exhibits an appreciable tem- perature dependence. The following table gives experimental data on this effect. Assuming that water vapor obeys the ideal gas law, calculate the molecular polar- izability as a function of inverse temperature and plot it. From the slope of the curve, deduce a value for the permanent dipole moment of the H2O molecule (ex- press the dipole moment in coulomb-meters). T(K) Pressure (cm Hg) (ele, - 1) X 10 393 423 453 483 56.49 60.93 65.34 69.75 400.2 371.7 348.8 328.7