Answered: Boiling Surface Point Tension Viscosity…

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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Question

The boiling points, surface tensions, and viscosities of
water and several alcohols are as shown below:

(a) From ethanol to propanol to n-butanol the boiling
points, surface tensions, and viscosities all increase. What
is the reason for this increase? (b) How do you explain
the fact that propanol and ethylene glycol have similar
molecular weights (60 versus 62 amu), yet the viscosity of
ethylene glycol is more than 10 times larger than propanol?
(c) How do you explain the fact that water has the
highest surface tension but the lowest viscosity?

Boiling Surface
Point Tension
Viscosity
(C) (1/m?)
(kg/m-s)
Water, H20
100 7.3 x 10-2 0.9 x 10-3
Ethanol, CH3CH2OH
78
2.3 x 10-2 1.1 x 10-3
Propanol, CH3CHLCH2OH
97 2.4 x 10-2
2.2 x 10-3
п-Butanol, CH,CH,СH,CH,ОH 117
2.6 x 10-2 2.6 x 10-3
Ethylene glycol, НОСH-CH,OH 197
4.8 x 10-2 26 x 10-3

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