122ch13e_001

122ch13e_001 - _..__ ".44 A , (I, 4/9.;...

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Unformatted text preview: _..__ ".44 A , (I, 4/9.; "233g a. w m M [1/ I. ,7]! i ‘ hi7 _ - _ p ._ __| ._ _ 4M __ [£5.4Li9 1.54? -' 31M? ; é. __ : Azalfi); [Q . 1- (3) [A gag/21W 40.22:) j%%‘M—:é 2mm §_; _ :fl 531C . _ h—JE. ' "' ' ‘ AZ;— =flwZ-mzrfl‘@ _ .IM'W _'___[%f_-. 0233; A;_Z./flfl7%4541 751/6 8.5:) ‘ , Aaséwkfl 3 _w__7§,4,§..3..4gw-_4Zgu = Mafia fie}? '1 “‘59, 41:29; WW. @2942 ff. 46¢ afm‘zr’yd [Z :2, Mézeézwgfl’e] ____ * a - f *__AJ; , I '11 , ‘ ’4 NC 1. 4/1 131.1 ' a é'mfim dz ESQ/9&1 Qfi £5; {£4 54‘ 4; {22% (, MW m“ ~ 0 _ _ , ll . _ __ _ __a____ _ CHSCEN 34.2 CH3C~H 30.4 ‘T ' Antietam Acetaldehyde *T“ ' 'T’ _ __ fi _ _ w __ I- m - -- CHaCCJHa 320 cruel-12cm 19.0 — -—— -—— __._, . Acetone propane .. .______ ....._..__# ___ _ _. I CH2 0 _ _ _ __ __._..._ / \ / \ _‘_ ___________ __ HzC CH: 247 HZC—-CH, 235 _ _ _ _*_w__w_fi Cydopmpane Edlylenerwle The stronger the intermolecular forces, the higher the heat (enthalpy) of vaporization. I (a) None of the substances are capable of hydrogen bonding in the pure liquid, and they ’ - ' I have similar molar masses. All intermolecular forces are van der Waals forces, ' m. dipole-dipole and dispersion forces. In decreasing order of strength of forces: ——- acetonitrile > acetone > acetaldehyde > ethylene oxide > cyclopropane > psopahe‘ — a V The first four compounds have dipole-dipole and dispersion forces, the last two only dispersion forces(/.F). /45 41,424 aéave (L F) ' w I in ,me WW faraway/t) - —-—_ — (b) The order of solubility in hexane should be the reverse of the order above. The least "" w polar substance, propane, will be most soluble in hexane. Ethanol, CHacHon, is -——— capable of hydrogen bonding with the four polar compounds; Thus. acetonitrile, Mu; acetaldehyde, acetone and ethylene oxide should be more soluble than propane and - _'.. I - cyclopropane. butwithout further information we cannot distinguish among the polarw— molecules. ' _ I . I I I . ’&‘ I I I 3 . . [/4 I ~___._.«—e_ . ' _. C _ 1W Mm wm_ cation (9) + anion (g) + solve ,;___‘_ spivation energy of gaseous ions ; bl .——-—- I— All, : I lattice energy solution . (L E) AHsoln : *6/33 *fl/é : p f I / .- , . 4' l I s 1‘" A4 ’ , 4’1'»_ r [4.4 l K J /14_.4 91" // «I' ’1 I 1 53(12- . 1-71 /m 7— / (L... + .11 M WM ...
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122ch13e_001 - _..__ ".44 A , (I, 4/9.;...

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