Explaining Vapor Pressure in Terms of IMFs Given the shown structural formulas for these four compounds, explain their relative vapor pressures in terms of types and extents of IMFs: OH I H₂C-CH₂ ethanol HO OH | | H₂C-CH₂ ethylene glycol CH3-CH₂-O-CH₂-CH3 and H-O-H diethyl ether water
Explaining Vapor Pressure in Terms of IMFs Given the shown structural formulas for these four compounds, explain their relative vapor pressures in terms of types and extents of IMFs: OH I H₂C-CH₂ ethanol HO OH | | H₂C-CH₂ ethylene glycol CH3-CH₂-O-CH₂-CH3 and H-O-H diethyl ether water
Chemistry
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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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Explaining Vapor Pressure in Terms of IMFs
Given the shown structural formulas for these four compounds, explain their relative vapor pressures in
terms of types and extents of IMFs:
OH
I
H₂C-CH₂
ethanol
HO
OH
| |
H₂C-CH₂
ethylene glycol
Solution
CH₂CH₂OH: H-bonding & LDF.
CH₂OHCH₂OH: Stronger H-bonding than ethanol (also LDF), and higher MM than H₂O.
More viscous than ethanol, thus quite a low P
vap.
CH3-CH₂-0-CH₂ CH3 and H-O-H
diethyl ether
water
C4H₁0O: Dispersion forces AND dipole-dipole. Diethylether is quite a volatile
substance, with quite a high Pvap:
vap•
H₂O: H-bonding & LDF. Although the molecule with the LOWEST Molar Mass, it has
Of the choices above, ONLY ethylene glycol has a LOWER Pvap-
a low Pvap.
LOWEST Pvap
HIGHEST Pvap
<diethyl ether
ethylene glycol <
H₂O
< CH₂CH₂OH
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