Mass Transfer II (CH3006D) Assignment 1: T, K X y
Mass Transfer II (CH3006D) Assignment 1: T, K X y
Mass Transfer II (CH3006D) Assignment 1: T, K X y
Assignment 1
1. Assuming the Raoult's law to be valid for the system benzene (A)-ethyl benzene (B) and
the vapor pressures are given by the Antoine equations
2788.51
In PAS = 13.8858 - T− 52.36
3279.47
In PBS = 14.0045- T−60.00
where P is in kPa and T is in K. Construct the T-x-y diagram at 101.3 kPa.
2. An equimolar mixture of n-heptane (A) and n-octane (B) is continuously flash vaporized
at atmospheric pressure to vaporize 60% of the feed. Determine
(a) Composition of the products
(b) Temperature in the separator
(c) The percent of feed to be vaporized to produce a distillate containing 65 mol%
heptane.
The mole fraction of heptane in the liquid and vapor in equilibrium at 101.3 kPa is as
follows:
4. A mixture containing chlorobenzene and water is being distilled. The liquids may be
assumed immiscible. The distillation is carried out under such condition that the two
liquid layers a present in the still. The vapor pressure data follow:
3295.12
Chlorobenzene: In P S = 13.9926 - T−55.60
3799.887
Water: In P S = 16.26205 - T−46.854
Determine the temperature of distillation and the composition of the vapor if the
pressures 40 kPa.
x 0.65 0.58
y 0.82 0.78
Assuming that the latent heats of vaporization are the same for all mixtures, and the feed
is saturated liquid, calculate (a) the reflux ratio (b) the vapor rate in the stripping section
in kmol/h