Chapter 10  Section B  NonNumerical Solutions
10.5
For a binary system, the next equation following Eq. (10.2) shows that
P
is linear in
x
1
. Thus no
maximum or minimum can exist in this relation. Since such an extremum is required for the existence
of an azeotrope, no azeotrope is possible.
10.6
(
a
) Because benzene and toluene are chemically similar and the pressure is only 1(atm), this system
can be modeled by Raoult’s law to a good approximation.
(
b
) Although
n
hexane and
n
heptane are chemically similar, a pressure of 25 bar is too high for
modeling this system by Raoult’s law.
(
c
) At 200 K, hydrogen is supercritical, and modeling the hydrogen/propane system at this tempera
ture by Raoult’s law is out of the question, because no value of
P
sat
for hydrogen is known.
(
d
) Because isooctane and
n
octane are chemically similar and at a temperature (373.15 K) close to
their normal boiling points, this system can be modeled by Raoult’s law to a good approximation.
(
e
) Water and
n
decane are much too dissimilar to be modeled by Raoult’s law, and are in fact only
slightly soluble in one another at 300 K.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '11
 Ku
 Partial Pressure, Vapor pressure, Vapor, Water vapor

Click to edit the document details