Updated Oct.14/04 ----------------------------------------------------------------------------------------- NUMERICAL ANSWERS TO ASSIGNED TUTORIAL PROBLEM SETS FOR CHEM206 FROM KOTZ & TREICHEL'S CHEMISTRY & CHEMICAL REACTIVITY ----------------------------------------------------------------------------------------- NOTE: these answers have NOT been verified. NOTE: "^" means "raised to the power of..." to indicate scientific notation Ch. Q# Ans. Units SFs Comments --------------------------------------------------------------------------------------------------- 13 1 see text 13 17 I2(s): induced dipole - induced dipole 13 17 CH3OH: hydrogen bonding 13 17 I2 & CH3OH: induced dipole - dipole 13 19a induced dipole - induced dipole 13 19b hydrogen bonding 13 19c dipole - dipole 13 19d induced dipole - induced dipole 13 21 increasing forces: He < butane < methanol 13 21 gases at RT/1atm: He, butane 13 23 HCO2H (formic acid) 13 25 1.99 kJ 3 13 31 predict bp CH4 < CO < NH3 < SCl2 13 33a increase 13 33b increases 13 33c no change 13 33d increases 13 51a induced dipole - induced dipole 13 51b hydrogen bonding 13 55 6.0x10^1 mol 2 only 17mol is present, so all will evaporate 13 57 ICl (polar molecule) 13 57 krypton (greater molar mass) 13 57 ethanol (hydrogen bonding) 13 59 350 mm Hg 2 13 59 ethanol 13 59 84 C 2 13 59 CS2 46C; C2H2OH 78C; C7H16 99C 13 59 CS2 gas; C2H2OHgas; C7H16 liquid 13 61 increasing forces: CO2 < CH3Cl < HCO2H 13 67 1-propanol (H-bonding) > methyl ethyl ether (dipole-dipole) 13 71 increasing enthalpy of vaporization: C2H6 < HCl < CH3OH