Problem 4.1: Vapour pressures for water and hex- ane droplets with the Kelvin equation What is the increase in vapour pressure (over that of a flat surface) for droplets of water and n-hexane at 20 °C? What do you observe? For which liquid is the effect more pronounced and why? Make an application for the following radii values: 107, 10, 10 and 0.5 x 10 m. The physical data for water and n-hexane, which are required, are given in the following table: Liquid volume (cm' mol") Liquid Surface tension (mN m') Water 72.8 18.0 n-Hexane 18.4 130
Problem 4.1: Vapour pressures for water and hex- ane droplets with the Kelvin equation What is the increase in vapour pressure (over that of a flat surface) for droplets of water and n-hexane at 20 °C? What do you observe? For which liquid is the effect more pronounced and why? Make an application for the following radii values: 107, 10, 10 and 0.5 x 10 m. The physical data for water and n-hexane, which are required, are given in the following table: Liquid volume (cm' mol") Liquid Surface tension (mN m') Water 72.8 18.0 n-Hexane 18.4 130
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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Transcribed Image Text:Problem 4.1: Vapour pressures for water and hex-
ane droplets with the Kelvin equation
What is the increase in vapour pressure (over that of a
flat surface) for droplets of water and n-hexane at
20 °C? What do you observe? For which liquid is
the effect more pronounced and why?
Make an application for the following radii values:
107, 10, 10" and 0.5 x 10 m.
The physical data for water and n-hexane, which
are required, are given in the following table:
Liquid volume
(cm' mol")
Liquid
Surface tension
(mN m)
Water
72.8
18.0
n-Hexane
18.4
130
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