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00000CH201121902

Pages: 4

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree (S,FE) Examination December 2020

Course Code: CH201
Course Name: CHEMICAL PROCESS CALCULATIONS

PARTA
Answer any two full questions, each carries 15 marks.
Use of Psychrometric chart may be permitted
Differentiate unit operations and unit processes. Give two examples each.

A solution of KCI has a concentration of 20 ppm. Find the concentration in (i)
wt% and (ii) Molality.
A gas mixture has the following composition by volume:

CO, - 25 %, CO -10%, ‏و50‎ - 15%, 02 - 8%, 14 - 42%
Calculate: (i) Average Molecular weight, (ii) Composition in weight % and (iii)
density at standard conditions.
The specific gravity of an oil is 0.88 at 288.8 K. Determine the corresponding
values in Baume and API scales.
In a gas mixture consisting of hydrogen, nitrogen and carbon dioxide, the partial
pressures are 25kPa, 35kPa, and 140kPa respectively. For 60m* of gas,
determine: (i) the number of moles of the mixture, (ii) number of moles and
mole fraction of nitrogen and (iii) average molecular weight of the mixture.
Given heat capacity of oxygen as a function of temperature, in the form

Cp (kJ/kmol K) = എന്‌,

Where T is in Kelvin, a = 25.74, ந = 12.987x10° and ടേ -3.864x10°. Change
the equation into the form in which Cp is given in cal/(mol.°C) and temperature
in °C.
Define Compressibility factor and write the use of Compressibility factor charts.
A solution of NaCl has a concentration of 20 wt%. Find: (i) Molarity, (ii)
Molality and (iii) Normality. The density of the solution is 1.148 81/0073.
100 m*/h of an ammonia - air mixture containing 20% ammonia by volume is
admitted to an absorption column at 120 kPa and 300 K in order to recover

ammonia by absorbing water. The gas leaves the column at 100 kPa and 280 K

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Duration: 3 Hours

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