From the Antoine equation (Table B.4) the temperature at which the vapor pressure of n-hexane is 7 bar (5250mmHg) is 146°C, and this is therefore the temperature at which the vaporization actually occurs. I need help understanding where both the 5250 mm Hg and the 146 deg C came from. Focus on Vaporization and Heating
From the Antoine equation (Table B.4) the temperature at which the vapor pressure of n-hexane is 7 bar (5250mmHg) is 146°C, and this is therefore the temperature at which the vaporization actually occurs. I need help understanding where both the 5250 mm Hg and the 146 deg C came from. Focus on Vaporization and Heating
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
Problem 1.1P
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From the Antoine equation (Table B.4) the
temperature at which the vapor pressure of n-hexane is 7 bar (5250mmHg) is 146°C, and this is therefore the
temperature at which the vaporization actually occurs.
I need help understanding where both the 5250 mm Hg and the 146 deg C came from.
Focus on Vaporization and Heating
Transcribed Image Text:be vaporized isothermally at 130°C but the only
available value of the heat of vaporization is at 80°C A process path from the liquid at 130°C to the
vapor at the same temperature must then be chosen that includes an isothermal vaporization step at
80°C: specifically, cool the liquid from 130°C to 80°C, yaporize the liquid at 80°C, and then heat
the vapor back to 130°C. Summing the changes in enthalpy for each of these steps yields the
vaporization at 130°C.)
change in enthalpy for the given process. (By definition, the calculated value is the latent heat of
n
40°F
Rain
Vaporization and Heating
One hundred g-moles per hour of liquid n-hexane at 25°C and 7 bar is vaporized and heated to 300°C at
constant pressure. Neglecting the effect of pressure on enthalpy, estimate the rate at which heat must be
supplied.
OVO
An energy balance yields
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