Question

Consider a mixture of 30% n-butane, 35% n-hexane, 35% n-heptane. If the pressure is 202 kPa, calculate the dew point temperature in ?C and the unknown mole fractions. Specify whether the unknown mole fractions are vapor or liquid.

Answer #1

Consider a mixture of 30% n-butane, 35% n-hexane, 35%
n-heptane.
a. If the temperature is 40 ?C, calculate the bubble point
pressure in kPa and the unknown mole fractions. Specify whether the
unknown mole fractions are vapor or liquid.
b. If the temperature is 50 ?C, what is the dew point pressure
in kPa and what are the unknown mole fractions? Specify whether the
unknown mole fractions are vapor or liquid.

Consider a mixture of 30% n-butane, 35% n-hexane, 35% n-heptane.
If the temperature is 50 ?C, what is the dew point pressure in kPa
and what are the unknown mole fractions? Specify whether the
unknown mole fractions are vapor or liquid.

A mixture has 10% n-butane, 90% hexane. The temperature is 60
?C
Calculate the bubble point pressure and the unknown mole
fractions.

A mixture of 35 mole% n-hexane (C6H14) and rest n-heptane
(C7H16) is fed to a flash drum operating at 1500 mmHg pressure. The
feed rate is 100 mol/s. The mixture is heated to 100C, and the
vapor and liquid are removed continuously. Assuming ideal
conditions, calculate vapor and liquid flow rates and
compositions.

A mixture of 35 mole% n-hexane (C6H14) and rest n-heptane
(C7H16) is fed to a flash drum operating at 1500 mmHg pressure. The
feed rate is 100 mol/s. The mixture is heated to 100C, and the
vapor and liquid are removed continuously. Assuming ideal
conditions, calculate vapor and liquid flow rates and
compositions.

A
mixture of n-heptane and n-hexane containing 25 mol% n-hexane is
vaporized at a pressure of 100kPa. Determine the following
a)The bubble point temperature
b)The composition of the vapor
The vapor pressures are given by the Antoine equation:
lnP*= A-(B/T-C)
Where P is in kPa and T is in K. The Antoine constants are
given as follows:
n-heptane: A=13.8587,B=2911.32,C=56.51
n-hexane:
A=13.8216,B=2697.55,C=48.78

Consider a flash drum operating at 69oC that is fed a
mixture of n-pentane, n-hexane and nheptane at compositions of
0.55, 0.25 and 0.20, respectively. The vapor pressures for these
compounds are 2.755, 1.021, and 0.39 bar, respectively at this
temperature. Determine the dew point pressure of this mixture and
the liquid composition.

a mixture of 65 mol % n hexane and 35 mole % n octane is fed to
a flash drum operating at 1500 mm Hg. Feed rate is 100 gmol/s.
Mixture is heated to 110 degrees celcius, which the mixture
vaporizes. Vapor and liquid products are removed constantly,
A) Calculatae the vapor and liquid product compositions (Mol % n
hexane and n octane)
B) Calculate the vapor and liquid flow rates (gmol/s) y hex =
0.7 x hex = 0.6...

3. A closed container at 58.1˚C and 285 mm Hg contains a mixture
of n-heptane and cyclohexane. Both liquid and vapor phases exist in
equilibrium, and the vapor phase contains 32 mol % n-heptane.
a) Calculate the mole fractions of the liquid phases.
b) Now, the pressure in the container doubles, will the saturation
pressure of n-heptane increase, decrease, or stay the same? Justify
your answer.

3.A closed container at 58.1˚C and 285 mm Hg contains a mixture
of n-heptane and cyclohexane. Both liquid and vapor phases exist in
equilibrium, and the vapor phase contains 32 mol % n-heptane.
a)Calculate the mole fractions of the liquid phases. b)Now, the
pressure in the container doubles, will the saturation pressure of
n-heptane increase, decrease, or stay the same? Justify your
answer.

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