Math  /  Data & Statistics

QuestionFor each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy SS of the system, decrease SS, or leave SS unchanged. If you don't have enough information to decide, check the "not enough information" button in the last column.
Note for advanced students: you may assume ideal gas and ideal solution behaviour. \begin{tabular}{|c|c|c|} \hline System & Change & ΔS\Delta S \\ \hline A solution made of potassium chloride (KCl)(\mathrm{KCl}) in water, at 80C80^{\circ} \mathrm{C}. & 50. mL of pure water is added to the solution. & ΔS<0\Delta S<0 ΔS=0\Delta S=0 ΔS>0\Delta S>0 not enough information \\ \hline A mixture of krypton (Kr)(\mathrm{Kr}) gas and xenon ( Xe ) gas at 2 atm and 47C47^{\circ} \mathrm{C}. & An additional 2.0 L of pure Xe gas is added to the mixture, with the pressure kept constant at 2 atm . & ΔS<0\Delta S<0 ΔS=0\Delta S=0 ΔS>0\Delta S>0 not enough information \\ \hline 1.0 g of potassium chloride (KCl)(\mathrm{KCl}) and 2.0 L of pure water at 80C80^{\circ} \mathrm{C}, & The potassium chloride is dissolved in the water. & ΔS<0\Delta S<0 ΔS=0\Delta S=0 S>0\triangle S>0 not enough information \\ \hline \end{tabular}

Studdy Solution
For the KCl\mathrm{KCl} solution dilution, ΔS>0\Delta S > 0.
For the Kr\mathrm{Kr} and Xe\mathrm{Xe} gas mixing, ΔS>0\Delta S > 0.
For the KCl\mathrm{KCl} dissolving in water, ΔS>0\Delta S > 0.

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