Thermodynamics is the study of heat and energy. It is a physical science that covers a wide range of topics, from the behavior of gases to the workings of engines. . Thermodynamics is a branch of physics that deals with the relationship between heat and energy. The word "thermodynamics" comes from the Greek words for "heat" and "power." Thermodynamics is a very old science; its roots can be traced back to the early 19th century.
Thermodynamics is divided into three main branches:
Classical thermodynamics, statistical thermodynamics, and kinetic theory. Classical thermodynamics deals with the behavior of gases and other macroscopic systems. Statistical thermodynamics deals with the behavior of molecules and other microscopic particles.
Thermodynamic principles are used in a variety of fields, such as engineering, biology, and chemistry. Thermodynamic concepts are also important in the study of phase transitions, such as the melting of ice or the boiling of water.
In addition, thermodynamics is used to understand a wide range of phenomena, from the behavior of black holes to the properties of materials. Thermodynamics is a vital part of many scientific disciplines, and it plays a key role in our understanding of the universe.
Following are some of the multiple choice questions on the Thermodynamics with answers that will help the students in developing their knowledge.
2. Which of the following has the highest calorific value?
3. How does a refrigerator work?
4. Mixture of ice and water form a
5. Addition of heat at constant pressure to a gas results in
6. Warm air rises and cold air sinks demonstrates what?
8. Which of the following is NOT a conductor?
9. Which of the following gas has the highest calorific value?
10. The absolute zero pressure can be attained at a temperature of
11. For an adiabatic process, which of the following statements is correct?
12. The first law of thermodynamics is a restatement of the
13. How much energy is required to completely boil away 150g of 10o C water? Use C = 4.184 J/goC for water, and Hv = 2260 J/g.
14. What happens to particles when they are heated?
15. Which is an example of decreasing entropy in a closed system?
16. Which statement is true about the ENTROPY?
17. A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?
18. When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency
19. Water has a specific heat of 4184 J/KgºC. Wood has a specific heat of 1760 J/KgºC. What material needs more energy to raise the temperature 1ºC
20. In closed cycle gas turbine, the air is compressed
21. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to
22. How are solids different from liquids?
23. Carbonization of coal consists of
24. The value of cp/cv for air is
25. Which of the following is not a scale used to measure temperature?
26. All phase changes (changing states) requires energy to be added or taken away.
27. What happens on a molecular level when heat is removed from an object?
28. Transfer of heat in a gas or liquid by the motion of particles in the heated fluid
29. The unit of power in S.I. units is
30. When applying the first law of thermodynamics to a system, when is heat a positive quantity?
31. The kind of heat transfer that travels through space in electromagnetic waves is ______________________.
32. In physics, there is no such thing as
33. The _____ Law of Thermodynamics says that heat always flows from an object with a higher temperature to an object of lower temperature naturally
34. DON'T RUSH, YOU HAVE TIME.Frying an egg on a skillet. Referring to the egg, would the Enthalpy change be positive or negative?
35. The measure of average kinetic energy of all the particles within an object is called ____________.
36. DON'T RUSH, YOU HAVE TIME. Water droplets condensing on the inside of a window on a cold day. Is this process exothermic or endothermic?
37. Exothermic reactions...
38. Heat travels from the sun to the earth by the process of...
39. When you place the metal in boiling water, heat flows from the _________ to the _______.
40. Stored energy that results from the position or shape of an object is called...
41. If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?
42. If I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?
43. How many Joules of energy are required to make 100 grams of ice at 0 οC completely melt? The specific latent heat of fusion of ice is 334000 J/kg
44. Particles (molecules) in a ______________________ have less energy than the other states of matter.
45. One molecule of oxygen consists of __________ atoms of oxygen.
46. For the same maximum pressure and temperature,
47. Molecular volume of any perfect gas at 600 × 103 N/m² and 27°C will be
48. An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is
49. What does the "U" stand for the formula ∆U = Q + W
50. H2 + 2 C + N2 + 270.3 kJ --> 2 HCNIs this reaction endothermic or exothermic?
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