BE - SEMESTER 1
Subject Code: 3132604 Date: 30/11/2019
--- Content provided by FirstRanker.com ---
Subject Name: Rubber Physics & its thermodynamics
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
Marks
Q.1 (a) Differentiate Extensive properties & Intensive properties. 03
(b) A man circling the earth in a spaceship weighed 100 N at location there 04 the local gravitational acceleration was 2.5 m/s2.calculate the mass of the man and his weight on the earth.
(c) Derive the formula for entropy change of an ideal gas. 07
--- Content provided by FirstRanker.com ---
Q.2 (a) Describe the meaning of a spontaneous reaction in terms of enthalpy and 03 entropy changes.
(b) Explain the concept of Coefficient of Linear Thermal Expansion. 04
(c) How an estimation of heat of polymerization is carried out? 07
OR
(c) Short note on Thermodynamic investigation of polymer-polymer systems 07 for three component systems.
--- Content provided by FirstRanker.com ---
Q.3 (a) Classify the polymers according to their main chain backbone. Also give 03 their examples.
(b) What are the advantages and disadvantages of solution polymerization 04 techniques?
(c) Derive the Flory—Huggins Equation with respect to Entropy of mixing 07 and thermal solution.
OR
Q.3 (a) Classify the polymers according to their thermal behavior. Also give their 03 examples.
--- Content provided by FirstRanker.com ---
(b) What are the advantages and disadvantages of suspension polymerization 04 techniques?
(c) Explain in detail about enthalpy of mixing of two polymers & free energy 07 of mixing of polymers for’binary polymer-polymer systems.
Q.4 (a) Summarize the general rules of polymer solubility. 03
(b) Derive the formula to calculate the surface tension with suitable 04 experimental setup.
(c) Discuss in detail about characteristic properties of Rubber. 07
--- Content provided by FirstRanker.com ---
OR
Q.4 (a) Summarize the different molecular motions observed in Rubber. 03
(b) Derive the formula to calculate the relative viscosity with suitable 04 experimental setup.
(c) Discuss the conditions which are necessary for Polymer to behave as 07 Rubber.
Q.5 (a) Distinguish the Rubbery deformation and elastic deformation. 03
--- Content provided by FirstRanker.com ---
(b) Explain about the elastic collisions observed in Rubber. 04
(c) Discuss in detail about different types of friction observed in Rubber. 07
OR
Q.5 (a) State the Archimedes principle of Flotation. 03
(b) Explain in brief on Polymer solution. 04
--- Content provided by FirstRanker.com ---
(c) Discuss in detail about the four elastic constants. 07
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University