T bp K bp x c m x solute particlessolute molecule Where K bp is the boiling

# T bp k bp x c m x solute particlessolute molecule

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T bp = K bp x c m x ( solute particles/solute molecule) Where K bp is the boiling point elevation constant for the solvent Henry’s Law: M dissolved gas = K H x (partial pressure of gas above solution) where K H is the Henry’s Law constant for that gas and solvent Raoult’s Law: vp solution = vp pure solvent x X solvent Constants and other info you might need to know: K H for O 2 in aqueous solutions at 30 o C = 8.9 x 10 -4 M atm -1 K bp water = 0.512 o C cm -1 K fp water = 1.858 o C cm -1 The approximate composition of air: 79% N 2 ; 20% O 2 ; 1% other gases C ice = 36 J mol -1 K -1 C water = 75 J mol -1 K -1 C steam = 36 J mol -1 K -1 H fusion = 6 kJ mol -1 H vaporization = 41 kJ mol -1 R = 0.08206 L atm mol -1 K -1 Answers
1. ~8% (8pts) 2. Dispersion, Dipolar, Hydrogen Bonding (5pts) 3. Molecular, Network, Metallic, Ionic (5pts) 4. N/A (8pts) 5. 28510 J (8pts) 6. a) NaCl; b) Water; c) Liquid (5pts) 7. ~3.4 m (8pts) 8. ~0.94 (8pts) 9. Octane and hexane are both non-polar; water is polar. (5pts) 10. 1.78 E-4 M (8pts) 11. ~23.11 torr (8pts) 12. -2.9 o C (8pts) 13. 100.80 o C (8pts) 14. 122.2 g/mol (8pts)

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• Spring '08
• SHUMAN

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