Correct calculation of ΔH°, ΔC°P, and ΔV° from temperature and pressure dependences of equilibrium constants: The importance of thermal expansion and compressibility of the solvent |
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Authors: | Loren G Hepler |
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Institution: | Department of Chemistry, University of Lethbridge, Lethbridge, Alta., T1K 3M4 Canada |
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Abstract: | Activities of solutes and compositions of solutions may be expressed corretly in terms of molarity (c), molality (m) or mole fraction (x), leading to corresponding equilibrium constants Kc, Km, or Kx. Equations for differences between ΔG°c, ΔG°m, and ΔG°x values are derived. Common errors in calculations involving (dlnKc/dT) and (dlnKc/dP) are identified and remedies for these errors are presented. |
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