JNTU
JNTU B.Tech II THERMODYNAMICS OF MATERIALS Previous Question Paper (September/October - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Write the importance of Darken’s Equations?
Answer
Darken's equations are crucial for relating the intrinsic diffusion coefficients of individual species in a binary alloy to the experimentally measured interdiffusion coefficient. They account for the motion of the lattice reference frame (Kirkendall effect), allowing for the accurate determination of atomic flux in non-ideal solid solutions.
Write the applications of Fick’s Law of Diffusion?
Answer
Fick's laws are applied to model mass transport processes in materials, including: 1) Predicting the rate of homogenization in alloys during heat treatment. 2) Calculating carburization or decarburization depths in steel surface hardening. 3) Determining the kinetics of oxidation and corrosion processes.
Briefly explain about the Richardson’s diagram?
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Write briefly on Interpretation of two more free energy change vs Temperature lines?
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Write a short note on Henry’s Law?
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What is Sieverts law, write its importance?
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Write the importance of solidus line during the solidification of a eutectic alloy?
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Define Chemical Potential?
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Write the difference between electro chemical cell and electrolytic cell.
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Define half-cell potential and standard electrode potential?
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Part B
Discuss in detail about intrinsic diffusivities.
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Explain in detail about the self-diffusion in pure metals.
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Draw the Ellingham diagram for both sulphide and oxide reactions and explain the significance.
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Write the method of calculation of equilibrium constant from standard energy changes.
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Write Explanatory notes on Excess Thermodynamic Quantities?
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Explain in detail about regular solutions with examples?
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Explain the calculations of liquidus line for eutectic system with suitable examples.
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Explain the calculations of solidus and liquidus lines for ideal solutions with suitable examples?
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Discuss different Electro- Chemical cells and derive Nernst equation to determine the EMF of a cell
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Explain Galvanic cell with suitable line diagram.
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