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Thermodynamics Practice Test: Properties of Pure Substances
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Properties of Pure Substances topics include: Pure substance, p-v, p-t and t-s diagrams, steam quality measurements and steam tables. A pure substance is a unique form of matter with a constant chemical composition and characteristic properties. Pure substances have a fixed composition and are made up of only one type of atoms or molecules. They also have a fixed density, melting point, and boiling point.  Pure substances can take the form of a single element or chemical compound. Elements are pure substances that cannot be broken down into simpler substances. Compounds are pure substances... Show more
Thermodynamics Practice Test: Properties of Pure Substances
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25 Questions

1. The internal energy of saturated water at the triple point is
2. Phase change occurs at
3. For a liquid-vapour mixture, which of the following can give us all the properties of the mixture?
4. At a pressure below the triple point line,
5. Which of the following is correct?
6. An 80 litre vessel contains 4 kg of R-134a at a pressure of 160 kPa. Determine the quality.
7. Saturated liquid or the saturated vapour has how many independent variables?
8. Quality indicates the
9. To fix the state and determine the quality of the mixture, we can do this by
10. The triple point is a line on the p-V diagram, where all the three phases, solid, liquid and gas exist.
11. Which of the following represents the specific volume during phase transition.
12. Devices such as calorimeters are used to for determining the quality or enthalpy of the mixture.
13. At critical point, value of Vg-Vf is
14. When the temperature of a liquid is less than the saturation temperature at the given pressure, the liquid is called compressed liquid.
15. A combined separating and throttling calorimeter is also used to measure the quality.
16. The slopes of sublimation and vaporization curves for all substances are
17. When does a vapour become superheated?
18. In which of the following state does water exist?
19. The slope of the fusion curve for water is
20. A rigid tank contains 10 kg of water at 90°C. If 8 kg of the water is in the liquid form and the rest is in the vapour form, determine the volume of the tank.
21. Which of the following exists in a p-V diagram for water?
22. Which of the following statement is true?
23. Specific volume of the mixture is given by
24. Total volume of a liquid vapour mixture is given by
25. Which of the following statements is true?