AP Chemistry
9.2 Absolute Entropy and Entropy Change
9.1 Introduction to Entropy
A student mixes aqueous solutions of \(\text{Ba(NO}_3)_2\) and \(\text{Na}_2\text{SO}_4\), observing the immediate formation of a white precipitate of \(\text{BaSO}_4\text{(s)}\). The net ionic equation for the precipitation process is shown below.
\[\text{Ba}^{2+}\text{(aq)} + \text{SO}_4^{2-}\text{(aq)} \rightarrow \text{BaSO}_4\text{(s)}\]
Which of the following best predicts and explains the sign of \(\Delta S^\circ\) for this reaction?
\[\text{Ba}^{2+}\text{(aq)} + \text{SO}_4^{2-}\text{(aq)} \rightarrow \text{BaSO}_4\text{(s)}\]
Which of the following best predicts and explains the sign of \(\Delta S^\circ\) for this reaction?
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