Answered: 4. Why do things mix. What law of…

4. Why do things mix. What law of thermodynamics governs this behavior. Discuss mixing of polar and non-polar solutions with examples.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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14. Consider two ionic solids, both composed of singly-charged ions, that have different lattice energies. Which solid will be more soluble in water, the one with the larger lattice energy or the one with the smaller lattice energy? Assume that solute- solvent interactions are the same for both solids. (A) The solid with the larger lattice energy, if entropy increases as a result of mixing, and the solid with the smaller lattice energy, if entropy decreases as a result of mixing. (B) The solid with the smaller lattice energy, if entropy increases as a result of mixing, and the solid with the larger lattice energy, if entropy decreases as a result of mixing. (C) The solid with the smaller lattice energy. (D) The solid with the larger lattice energy. (E) They will have the same or very similar solubilities.
Use the following to calculate AH° lattice of MGF2. Mg(s) → Mg(g) F2(g) → 2 F(g) AH° = 148 kJ AHO = 159 kJ Mg(g) → Mg*(g) + e AH° = 738 kJ Mg*(g) Mg+2(g) + e AHO 1450 kJ F(g) + e → F (g) AH° = -328 kJ Mg(s) + F2(g) · MGF2(s) AH° = -1123 kJ kJ/mol
At 298 K, the Henry's law constant for oxygen is 0.00130 M/atm. Air is 21.0% oxygen. At 298 K, what is the solubility of oxygen in water exposed to air at 1.00 atm? solubility: M At 298 K, what is the solubility of oxygen in water exposed to air at 0.893 atm? solubility: M If atmospheric pressure suddenly changes from 1.00 atm to 0.893 atm at 298 K, how much oxygen will be released from 3.20 L of water in an unsealed container? amount: mol
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Which of the following characteristics describes water’s ability to act as nature’s solvent? A. The polar nature of water molecules attracts hydrophobic compounds, encouraging dissolution. B. The nonpolar nature of water molecules allows polar substances to dissolve easily in water. C. The polar nature of water molecules repels hydrophilic compounds, preventing dissolution. D. The polar nature of water molecules allows other polar and ionic substances to dissolve easily in water.
Does the addition of salt make the water boil faster or slower? Why? What does salt do to the boiling point of water?
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