Vapor pressure (mm Hg)9008007006005004003002001000Carbon disulfide44MethanolEthanol10 20 304060 70Temperature (°C)50Heptane80 90 100110The vapor pressure of propanol is 400 mm Hg at 82.0 °C. From the plot of vapor pressures vs temperature above,estimate the temperature at which the vapor pressure of ethanol is 400 mm Hg.°℃The heat of vaporization of propanol would be expected to bethan the heat of vaporization of ethanol.

Answered: Vapor pressure (mm Hg) 900 800 700 600…

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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Vapor pressure (mm Hg)
900
800
700
600
500
400
300
200
100
0
Carbon disulfide
44
Methanol
Ethanol
10 20 30
40
60 70
Temperature (°C)
50
Heptane
80 90 100
110
The vapor pressure of propanol is 400 mm Hg at 82.0 °C. From the plot of vapor pressures vs temperature above,
estimate the temperature at which the vapor pressure of ethanol is 400 mm Hg.
°℃
The heat of vaporization of propanol would be expected to be
than the heat of vaporization of ethanol.

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Introduction

The pressure exerted by a vapour with its condensed phases (solid or liquid) in a closed system at a specific temperature is referred to as vapour pressure, also known as vapour equilibrium pressure. It is well known that the equilibrium vapour pressure can be used to estimate how quickly a liquid will evaporate. It is recognised that there is a relationship between the tendency of particles to escape from a liquid (or a solid). A substance is typically said to as volatile if it has a high vapour pressure at room temperature. It should be mentioned that vapour pressure refers to the pressure that a vapour exhibits above a liquid surface.

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