Reg 210.2 न 02000CH2040520d3me:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fourth semester B.Tech examinations (S), September 2020

Course Code: CH204
Course Name: CHEMICAL ENGINEERING THERMODYNAMICS (CH)
Max. Marks: 100 Duration: 3 Hours

Specify the assumptions used, if any, for all questions

PART A
Answer any two questions. Each question carries 15 marks.
1 a) Explain the principle of corresponding states and bring out its applications. 5

b) Carbon tetrachloride boils at 349.8 K at a pressure of 1 bar. Determine its boiling 5

point at 3 bar pressure. The latent heat of vapourization ೦೯೮೮] is 30 kJ/mol.

c) Define fugacity. Derive an expression to determine the fugacity of a pure gas. 5
2 ஐ List the limitations of first law of thermodynamics and explain how they are 6
overcome by the second law.

b) A liquid is taken in a vessel fitted with a stirrer. The stirrer is run for half an hour 5
by a 3 hp motor. During this process, 1000 kJ/h heat is dissipated to the
surroundings. Determine the change in internal energy of the liquid.

c) What is an equation of state? Write van der Waals equation and explain the 4
correction terms incorporated.

3 9) Explain the significance of Joule Thomson inversion curve 3

b) 100 m3 of carbon dioxide initially at 423 K and 50 bar is to be isothermally 12
compressed in a frictionless cylinder and piston device to a final pressure of 300
bar. Assuming ideal gas behaviour,
i). Write the general expression for energy balance and denote the terms used.
ii). Calculate the volume of compressed gas (at 300 bar).
iii). Calculate the work required for compression.
iv). Calculate the heat flow on compression.

PART ‏تا‎
‎Answer any two questions. Each question carries 15 marks
4 a) Define chemical potential. Discuss its importance in Chemical Engineering 5

Thermodynamics.

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