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Thermodynamics Practice Test: First Law of Thermodynamics
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First Law of Thermodynamics topics include: Energy, enthalpy, first law for closed system, mass and energy balance. The first law of thermodynamics states that energy cannot be created or destroyed, but can be transferred from one form to another. It is also known as the law of conservation of energy.  The law distinguishes two main forms of energy transfer: Heat, Thermodynamic work. The law can be stated as: Energy can neither be created nor destroyed in a system of constant mass The amount of energy gained by the system must be exactly equal to the amount of energy lost by the... Show more
Thermodynamics Practice Test: First Law of Thermodynamics
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25 Questions

1. The total internal energy of the system is given by
2. Which of the following types of energy can be present in molecules?
3. The surface of the control volume is known as the control surface.
4. Heat transferred at constant pressure _____ the enthalpy of a system.
5. Which of the following represents the energy in storage?
6. If a certain mass of steam is considered as the thermodynamic system, then the energy equation becomes
7. For an ideal gas, enthalpy becomes
8. Work input is directly proportional to heat and the constant of proportionality is called
9. The enthalpy of an ideal gas depends only on the temperature.
10. The specific energy, e=E/m is an extensive property.
11. The total rate of flow of all energy streams entering the control volume must equal to that of leaving the control volume.
12. Steady flow means that the rates of flow of mass and energy across the control surface
13. Total enthalpy of a system H is given by
14. Which of the following is true in regard to the energy of an isolated system?
15. The first law of thermodynamics gives only the change on energy ΔE for the process.
16. Energy has different forms which include
17. Equation of continuity comes from
18. Specific heat of a substance at constant volume is a property of the system.
19. When more than one fluid stream enters or leaves the control volume, which type of balance is taken?
20. At constant pressure
21. When there is mass transfer across the system boundary, the system is called
22. Enthalpy is an intensive property of a system.
23. The steady flow energy equation is applied to which of the following processes?
24. A perpetual motion machine of first kind
25. The limitation of the first law is