Question

Calculate the boiling temperature and the vapor phase mole
fraction y1 at 85 kPa of the binary mixture with the liquid phase
mole fraction x1 = 0.40. Consider the mixture ideal. The saturation
vapor pressures of the components in the mixture are given below
and are T (° C);

P1sat
= exp [14.3 - 2945 / (T + 224)]

P2sat
= exp [14.2 - 2943 / (T + 209)]

Answer #1

Determine the vapor-liquid equilibrium curve of a binary mixture
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The vapor pressure of pure component A is 42.0 kPa at 298 K. The
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A single-stage liquid/vapor separation for the unknown molecule
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is 1mole/s and the molar fraction (V) of the vapor formed is 0.5.
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A solution that contains nitromethane (1) in acetonitrile (2) is
heated at a constant pressure of 1 bar until the first bubble
appears. If the temperature of the solution at this point is
85◦C, what is the composition of the original
solution?
You may assume that the solution is ideal. The saturation
pressures for the pure components (in kPa) for T in
◦C are given by
ln(p1sat) = 14.2742 –
2945.47/(224 + T)
ln(p2sat) = 14.2043 –
2972.64/(209 + T)

We have a mixture, which is an ideal solution in the liquid
phase and an ideal-gas mixture in the vapor phase, of n-heptane (1)
and n-octane (2) at a pressure of 1 bar with z1 = 0.25.
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(b) Calculate the heat required to bring the solution from its
bubble temperature to its dew temperature. Please use the Antoine
equations given in P11.5 to find the saturation pressures of these
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lnPsat= A-B/(C+t)...

The binary system, acetone(1)-acetonitrile(2) conforms closely
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a) Using the vapor-pressure data, prepare a graph showing P vs.
x1 and P vs. y1 at 50ºC, and a graph showing T vs. x1 and T vs. y1
at 400 mm Hg. Thus when T is fixed, x1 and y1 vary with P, and when
P is fixed, x1 and y1 vary with T.
b) The mixture which has an acetone mole fraction of 0.405 is
heated slowly (so as...

A grey body is one whose absorptivity
1. does not vary with temperature and wavelength of the incident
ray
2. is equal to its emissivity
3. varies with temperature
4. varies with wavelength of the incident ray
A liquid is in equilibrium with its vapor at its boiling point.
On an average, the molecules in the liquid and gaseous phases have
equal
1. potential energy.
2. kinetic energy.
3.temperature. 4. intermolecular forces of attraction.
A liquid of density 1000 kg/m3...

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