This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---
Subject Code:140502
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-IV EXAMINATION - WINTER 2017
--- Content provided by FirstRanker.com ---
Subject Name: Chemical Engineering Thermodynamics-I
Time: 02.30 PM TO 05.00 PM
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
--- Content provided by FirstRanker.com ---
Q.1 (a) Explain PVT Behavior of pure Substance with the help of PV and PT diagram? 07
(b) Differentiate between (1) Intensive Vs. Extensive property (2) State Vs. Path Function? 07
Q.2 (a) State the mathematical statement of second law of thermodynamics. 07
--- Content provided by FirstRanker.com ---
(b) A steel casting [Cp = 0.5 kJ kg-1 K-1] weighing 40 kg and at a temperature of 450°C is quenched in 150 kg of oil [Cp = 2.5 kJ kg-1 K-1] at 25°C. If there are no heat losses, what is the change entropy of @) the casting (i) the oil and (iii) both considered together? 07
OR
--- Content provided by FirstRanker.com ---
(b) Discuss thermodynamic diagrams. 07
Q.3 (a) Write in Brief about Maxwell relation. State the importance of it? 07
(b) An ideal gas with Cv=1.5R undergoes the following mechanically reversible changes in a series of non-flow processes as given below: a) From an initial state of 70 °C and 1 bar, it is compressed adiabatically to 150 °C. b) It is then cooled from 150 °C to 70 °C at a constant pressure. ¢) Finally the gas is expanded isothermally to its original state. Calculate Q,W, U and H for each of the three processes and for the cycle. 07
--- Content provided by FirstRanker.com ---
OR
Q.3 (a) Explain concept of Entropy-inbrief. 07
--- Content provided by FirstRanker.com ---
(b) Discuss important properties of a refrigerant. 07
Q.4 (a) Explain Liquefaction of gas with T-S diagram? 07
(b) A refrigeration machine operating at a condenser temperature at 290 K needs 1kW of power per ton of refrigeration. Determine (1) COP (2) heat rejected to the condenser (3) the lowest temperature that can be maintained. Given that :1 Ton of refrigeration =12660 kJ/h=3516.67 W 07
--- Content provided by FirstRanker.com ---
OR
Q.4 (a) Explain the importance of departure function in thermodynamic study? 07
--- Content provided by FirstRanker.com ---
(b) Explain Cascade Refrigeration with suitable diagram? 07
Q.5 (a) What is mach number? Show that the maximum fluid velocity attainable for flow through a pipe of a uniform cross-section is equal to the sonic velocity. 07
(b) Explain working principle of a heat pump. 10
--- Content provided by FirstRanker.com ---
OR
Q.5 (a) Derive the expression for Pc,Vc, Tc, and constant a and b for redlich Kwong equation of state? 04
--- Content provided by FirstRanker.com ---
(b) Define (1) Heat of reaction (3)Hess’s law of constant heat summation. 04
Date:21/11/2017
Total Marks: 70
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---