Chapter 13 - Chapter 13 1. Which one of the following...

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Chapter 13 1. Which one of the following statements is true? A. The heat of solution in H 2 O for KOH is the same as that for KOH ± H 2 O. B. For a compound to spontaneously dissolve in H 2 O at 25 ° C, the solution process must be exothermic. C. Ne is less soluble in H 2 O at 2 atm pressure than at 1 atm pressure. D. C 2 H 4 is very soluble in liquid NH 3 . E. None of the above. 2. Given the solutes NaCl and I 2 and the solvents NH 3 (l) and C 7 H 16 (heptane), which is true? A. NaCl and I 2 are both more soluble in NH 3 than in C 7 H 16 . B. NaCl and I 2 are both more soluble in C 7 H 16 than in NH 3 . C. NaCl is more soluble in NH 3 ; I 2 is more soluble in C 7 H 16 . D. NaCl is more soluble in C 7 H 16 ; I 2 is more soluble in C 7 H 16 . E. In order to determine relative solubilities in these cases one must know whether the solution reactions are exothermic or endothermic. 3. The Henry’s law constant for He gas in H 2 O at 30 ° C is 3.7 × 10 4 M/atm; that for N 2 at 30 ° C is 6.0 × 10 4 M/atm. If a gaseous He-N 2 mixture that has a He mole fraction of 0.30 is placed over the water A. the concentration of dissolved He will be greater than that of dissolved N 2 . B. the concentration ratio of dissolved He to dissolved N 2 would be 0.62. C. the concentration ratio of dissolved He to dissolved N 2 will be 0.26. D. the concentration ratio of dissolved He to dissolved N
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Chapter 13 - Chapter 13 1. Which one of the following...

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