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Unformatted text preview: a values. (b) From the equation Δ Gº = Δ Hº – T Δ Sº, we see that the contributions to the Δ Gº term are an enthalpy term ( Δ Hº) and a temperature times entropy term (T Δ Sº). These contributions are listed below for the two acids: Which is the dominant term in determining the value of Δ Gº (and hence K a of the acid)? (c) What processes contribute to Δ Hº? (Consider the ionization of the acids as a Bronsted acid-base reaction and think about bonds that are broken and formed.) (d) Propose a reason why T Δ Sº is more negative for CH 3 COOH. (Hint: ions in aqueous solutions have a tendency to order the dipolar water molecules surrounding them, with the extent of the ordering being greater for smaller ions.) Δ Hº (kJ) T Δ Sº (kJ) CH 3 COOH -0.57 -27.6 CH 2 ClOOH -4.7 -21.1...
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