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Thermodynamics Practice Test: Thermodynamic Relations, Equilibrium and Stability
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Thermodynamic Relations, Equilibrium and Stability topics include: Maxwells equation, energy equations, joule kelvin effect, clausis clapeyron equation, variable composition mixtures and equilibrium types. Thermodynamic equilibrium is a stable state where a system's properties remain constant over time. It's a state of equilibrium with respect to all possible changes, including thermal, mechanical, and chemical.  There are three types of thermodynamic equilibrium: Chemical equilibrium: A thermodynamic equilibrium in a system where direct and reverse chemical reactions are possible. In a... Show more
Thermodynamics Practice Test: Thermodynamic Relations, Equilibrium and Stability
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25 Questions

1. During phase transitions like vaporization, melting and sublimation
2. An equation in Gibbs energy is be given by
3. The second TdS equation is
4. The Gibbs-Duhem equation is given by
5. Which of the following requirement is satisfied by a phase change of the first order?
6. If a relation exists among variables x,y,z then z may be expressed as a function of x and y as, dz=Mdx+Ndy .
7. An isotherm of maximum slope on Z-p plot as p approaches zero is called the foldback isotherm and its value is
8. An insulated cylinder fitted with a piston contains R-12 at 25°C with a quality of 90% and V=45 L. The piston moves and the R-12 expands until it exists as saturated vapour. During this, R-12 does 7kJ of work against the piston. Determine the final temperature, assuming that the process is adiabatic.
9. The condition for exact differential is
10. The locus of all points at which the Joule-Kelvin coefficient is ____ is the inversion curve.
11. Water ____ on melting and has the fusion curve with a ____ slope.
12. If the temperature is constant, internal energy
13. A cylinder fitted with a piston contains 2kg of superheated R-134a vapour at 100°C, 350 kPa. The cylinder is then cooled so that R-134a remains at constant pressure till it reaches a quality of 75%. Calculate the heat transfer in this process.
14. If the temperature is half the original temperature, the volume of black-body radiation is to be ____ adiabatically ____ times its original volume for radiation to remain at equilibrium.
15. If the phase of a multi-component system is enlarged, which of the following will happen?
16. If a closed system is in equilibrium, which of the following remains constant?
17. For an ideal gas,
18. The equation Cp-Cv = -T*(∂p/∂V)(∂V/∂T)2 can also be expressed as
19. The first TdS equation is
20. According to Trouton’s rule, the ratio of latent heat of vaporization to the boiling point at 1.013 bar is
21. If u is the energy density then pressure(p) exerted by the black-body radiation in an enclosure is
22. Chemical potential is an extensive property.
23. An application requires R-12 at −140°C. The triple-point temperature is −157°C. Find the pressure of the saturated vapour at the required condition.
24. When a gas undergoes continuous throttling process by a valve and its pressure and temperature are plotted, then we get a
25. At chemical equilibrium, G will be minimum subjected to the equations of constraint.

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