Which of the following has the lowest entropy? a. none - all of these have the same entropy b. H2O (g, 100℃) c. H2O (s, –25℃) d. H2O (s, 0℃) e. H2O (l, 0℃) f. H2O (liquid, 100℃)

12. The following process is reversible for the specified conditions. CH3COOH(g, 118 oC, 1 atm)  ⟶  CH3COOH(l, 118 oC, 1 atm)   Are the following quantities positive (+), negative (-), or zero (0)?   For each response area, enter one of these symbols: +, -, 0   ΔH is . ΔS is  . ΔG is  . ΔSsurr is  . ΔSuniv is  .

10.

3. You are asked to determine the percentage of the components of a mixture containing sodium iodide Nal, magnesium hydroxide, Mg(OH)2, and barium sulfate, BaSO4. The total mass of your mixture sample is 4.82 g. First you extracted the Nal from the mixture with water and filtered insoluble Mg(OH)2 and Baso from the solution, containing the Nal. After evaporating and drying the filtrate, you find that you have recovered 0.95 g of Nal When you react the insoluble residue of Mg(OH)2 and BaSO4 with 3M HCI, the Mg(OH)2 dissolves. After decanting the supernatant liquid containing aqueous MgCl2 from the insoluble BaSO4 and drying the solid, you recover 2.04 g of BasO4 Finally you add 3M KOH solution to the aqueous solution to precipitate the Mg(OH)2. After filtering the solution and drying the precipitate, you recovered 1.21 g of Mg(OH)2. a) Calculate the percent Nal in the original sample mixture b) Calculate the percent Mg(OH)2 in the original sample mixture c) Calculate the percent BaSO,…