P.W. Seakins, M.J. Pilling, L.T. Niiranen, D. Gutman, and L.N. Krasnoperov (J. Phys
Chapter 22, Problem 22.18(choose chapter or problem)
P.W. Seakins, M.J. Pilling, L.T. Niiranen, D. Gutman, and L.N. Krasnoperov (J. Phys. Chem. 96, 9847 (1992)) measured the forward and reverse rate constants for the gas-phase reaction \(\mathrm{C}_2 \mathrm{H}_5(\mathrm{~g})+\mathrm{HBr}(\mathrm{g}) \rightarrow \mathrm{C}_2 \mathrm{H}_6(\mathrm{~g}) +\operatorname{Br}(\mathrm{g})\) and used their findings to compute thermodynamic parameters for \(\mathrm{C}_2 \mathrm{H}_5\). The reaction is bimolecular in both directions with Arrhenius parameters \(A=1.0 \times 10^9 \mathrm{dm}^3 \mathrm{~mol}^{-1} \mathrm{~s}^{-1}, E_{\mathrm{a}}=-4.2 \mathrm{~kJ} \mathrm{~mol}^{-1}\) for the forward reaction and \(k^{\prime}=1.4 \times 10^{11} \mathrm{dm}^3 \mathrm{~mol}^{-1} \mathrm{~s}^{-1}, E_{\mathrm{a}}=53.3 \mathrm{~kJ} \mathrm{~mol}^{-1}\) for the reverse reaction. Compute \(\Delta_{\mathrm{f}} H^{\ominus}, S_{\mathrm{m}}^{\ominus}\), and \(\Delta_{\mathrm{f}} G^{\ominus}\) of \(\mathrm{C}_2 \mathrm{H}_5\) at \(298 \mathrm{~K}\).
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