Chemistry

Chemistry

Problem

Four possible solute–solvent pairs are listed below. I. SO2\mathrm{SO_2} dissolved in nn-hexane II. SO2\mathrm{SO_2} dissolved in propane III. HCl\mathrm{HCl} dissolved in nn-hexane IV. HCl\mathrm{HCl} dissolved in propane Given the following data measured at 25 °C: • Dipole moment: μSO2=1.6 D\mu_{\mathrm{SO_2}} = 1.6\,\text{D}, μHCl=1.1 D\mu_{\mathrm{HCl}} = 1.1\,\text{D} • Molar polarizability: αn-hexane=11.9×10−24 cm3\alpha_{n\text{-hexane}} = 11.9\times10^{-24}\,\text{cm}^3, αpropane=8.0×10−24 cm3\alpha_{\text{propane}} = 8.0\times10^{-24}\,\text{cm}^3 Assuming similar separation distances in each mixture, which pair is expected to exhibit the strongest attractive interaction between solute and solvent molecules? a) Pair II b) Pair I c) Pair III d) Pairs I and III are equally strong

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