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K(a) for acetic acid at 27^(@)C is 2.0 x...

`K_(a)` for acetic acid at `27^(@)C` is `2.0 xx 10^(-5)` and at `77^(@)C, K_(a) is 2.5 xx 10^(-5)`. What are `DeltaH^(Theta)` and `DeltaS^(Theta)` for the ionisation of acetic acid?

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To solve the problem of finding \( \Delta H^\circ \) and \( \Delta S^\circ \) for the ionization of acetic acid, we can use the van 't Hoff equation, which relates the change in the equilibrium constant with temperature to the enthalpy and entropy changes of the reaction. ### Step-by-Step Solution: 1. **Identify the given data:** - \( K_a \) at \( 27^\circ C \) (300 K) = \( 2.0 \times 10^{-5} \) - \( K_a \) at \( 77^\circ C \) (350 K) = \( 2.5 \times 10^{-5} \) ...
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