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Homework answers / question archive / University of Alabama, Birmingham - ELC 101 THERMODYNAMICS - GEAS SERIES 1)The term “thermodynamics” comes from Greek words “therme” and “dynamis” which means
University of Alabama, Birmingham - ELC 101
THERMODYNAMICS - GEAS SERIES
1)The term “thermodynamics” comes from Greek words “therme” and “dynamis” which means .
• A. Heat power
• B. Heat transfer
• C. Heat energy
• D. Heat motion
2. The term “thermodynamics” was first used in 1849 in the publication of a
• A. Rudolph Clausius
• B. William Rankine
• C. Lord Kelvin
• D. Thomas Savery
3. What law asserts that energy is a thermodynamic property?
• A. First law of Thermodynamics
• B. Second law of Thermodynamics
• C. Third law of Thermodynamics
• D. Zeroth law of Thermodynamics
4. What law asserts that energy has quality as well as quantity?
• A. First law of Thermodynamics
• B. Second law of Thermodynamics
• C. Third law of Thermodynamics
• D. Zeroth law of Thermodynamics
5. The macroscopic approach to the study of thermodynamics does not require a knowledge of the behavior of individual particles is called .
• A. Dynamic thermodynamics
• B. Static thermodynamics
• C. Statistical thermodynamics
• D. Classical thermodynamics
6. What is the more elaborate approach to the study of thermodynamics and based on the average behavior of large groups of individual particles?
• A. Dynamic thermodynamics
• B. Static thermodynamics
• C. Statistical thermodynamics
• D. Classical thermodynamics
7. What is defined a region in space chosen for study?
• A. Surroundings
• B. System
• C. Boundary
• D. Volume
8. The first law of thermodynamics is based on which of the following principles?
• A. Conservation of mass
• B. Conservation of energy
• C. Action and reaction
• D. The entropy-temperature relationship
9. What is the mass or region outside the system called?
• A. Surroundings
• B. Boundary
• C. Volume
• D. Environment
10. What is the real or imaginary surface that separates the system from its surroundings?
• A. Division
• B. Wall
• C. Boundary
• D. Interface
11. A system which consists of fixed amount of mass and no mass can cross its boundary called .
• A. Equilibrium system
• B. Thermal equilibrium system
• C. Open system
• D. Closed system
12. A system in which even energy is not allowed to cross the boundary is called .
• A. Closed system
• B. Exclusive system
• C. Isolated system
• D. Special system
13. A system in which there is a flow of mass is known as .
• A. Equilibrium system
• B. Isolated system
• C. Open system
• D. Closed system
14. Open system usually encloses which of the following devices?
• A. Compressor
• B. Turbine
• C. Nozzle
• D. All of the above
15. The boundaries of a control volume, which may either real or imaginary is called .
• A. Control boundary
• B. Control system
• C. Interface
• D. Control surface
16. Any characteristic of a thermodynamics system is called a
.
• A. Property
• B. Process
• C. Phase
• D. Cycle
17. How are thermodynamic properties classified?
• A. Physical and chemical
• B. Intensive and extensive
• C. Real and imaginary
• D. Homogeneous and heterogeneous
18. The thermodynamic properties that are independent on the size of the system is called .
• A. Extensive property
• B. Intensive property
• C. Open property
• D. Closed property
19. The thermodynamic properties that are dependent on the size or extent of the system is called .
• A. Extensive property
• B. Intensive property
• A. Simple
• C. Open property
• D. Closed property
20. Which is NOT an intensive property of thermodynamics?
• A. Temperature
• B. Mass
• C. Pressure
• D. Density
21. Which is NOT an extensive property of thermodynamics?
• A. Density
• B. Mass
• C. Volume
• D. Energy
22. Extensive properties per unit mass are called .
• A. Specific properties
• B. Relative properties
• C. Unit properties
• D. Phase properties
23. A system is in equilibrium if the temperature is the same throughout the entire system.
• A. Static
• B. Thermal
• C. Mechanical
• D. Phase
24. A system is in equilibrium if there is no change in pressure at any point of the system with time.
• A. Pressure
• B. Thermal
• C. Mechanical
• D. Phase
25. If a system involves two phases, it is in equilibrium when the mass of each phase reaches an equilibrium level and stays there.
• A. Chemical
• B. Thermal
• C. Mechanical
• D. Phase
26. A system is in equilibrium of its chemical composition does not change with time, i.e., no chemical reaction occurs.
• A. Chemical
• B. Thermal
• C. Mechanical
• D. Phase
27. “The state of a simple compressible system is completely specified by two independent, intensive properties”. This is known as .
• A. Equilibrium postulate
• B. State postulate
• C. Environment postulate
• D. Compressible system postulate
28. What is the unit of the total energy of the system?
• A. Kj
• B. Kj/Kg
• C. Kg
• D. g
29. Without electrical, mechanical, gravitational, surface tension and motion effects, a system is called system.
• B. Simple compressible
• C. Compressible
• D. Independent
30. What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?
• A. Process
• B. Path
• C. Phase
• D. Cycle
31. What refers to the series of state through which a system passes during a process?
• A. Path
• B. Phase
• C. Cycle
• D. Direction
32. How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?
• A. 4
• B. 3
• C. 2
• D. 1
33. What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?
• A. Path equilibrium process
• B. Cycle equilibrium process
• C. Phase equilibrium process
• D. Quasi-state or quasi- equilibrium process
34. A closed system may refer to .
• A. Control mass
• B. Control volume
• C. Control energy
• D. Control temperature
35. An open system may refer to .
• A. Control mass
• B. Control volume
• C. Control energy
• D. Control temperature
36. A system is said to be in thermodynamic equilibrium if it maintains equilibrium.
• A. Mechanical and phase
• B. Thermal and chemical
• C. Thermal, mechanical and chemical
• D. Thermal, phase, mechanical and chemical
37. What is a process with identical end states called?
• A. Cycle
• B. Path
• C. Phase
• D. Either path or phase
38. What is a process during which the temperature remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric process
• C. Lord Kelvin
• D. Isometric process
39. What is a process during which the pressure remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric process
• D. Isometric process
40. What is a process during which the specific volume remains constant?
• A. Isobaric process
• B. Isothermal process
• C. Isochoric or isometric process
• D. Isovolumetric process
41. The prefix “iso” used to designate a process means .
• A. Cannot be interchanged
• B. Remains constant
• C. Approximately equal
• D. Slight difference
42. What does the term “steady” implies?
• A. No change with volume
• B. No change with time
• C. No change with location
• D. No change with mass
43. What does the tem “uniform” implies?
• A. No change with volume
• B. No change with time
• C. No change with location
• D. No change with mass
44. What is defined as a process during which a fluid flows through a control volume steadily?
• A. Transient-flow process
• B. Steady and uniform process
• C. Uniform-flow process
• D. Steady-flow process
45. The sum of all the microscopic form of energy is called .
• A. Total energy
• B. Internal energy
• C. System energy
• D. Phase energy
46. What type of system energy is related to the molecular structure of a system?
• A. Macroscopic form of energy
• B. Microscopic form of energy
• C. Internal energy
• D. External energy
47. What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as potential and kinetic energies?
• A. Macroscopic form of energy
• B. Microscopic form of energy
• C. Internal energy
• D. External energy
48. Who coined the word “energy” in 1807?
• A. William Rankine
• B. Rudolph Clausius
• D. Thomas Young
49. The molecules of a gas moving through space with some velocity possesses what kind of energy?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy
50. The electrons in an atom which rotate about the nucleus possess what kind of energy?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy
51. The electrons which spins about its axis will possess what kind of energy?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy
52. What refers to the portion of the internal energy of a system associated with the kinetic energies of the molecules?
• A. Translational energy
• B. Spin energy
• C. Rotational kinetic energy
• D. Sensible energy
53. What is the internal energy associated with the phase of a system called?
• A. Chemical energy
• B. Latent energy
• C. Phase energy
• D. Thermal energy
54. What is the internal energy associated with the atomic bonds in a molecule called?
• A. Chemical energy
• B. Latent energy
• C. Phase energy
• D. State energy
55. What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called?
• A. Chemical energy
• B. Latent energy
• C. Phase energy
• D. Nuclear energy
56. What are the only two forms of energy interactions associated with a closed system?
• A. Kinetic energy and heat
• B. Heat transfer and work
• C. Thermal energy and chemical energy
• D. Latent energy and thermal energy
57. What states that if two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other?
• A. Zeroth law of thermodynamics
• B. First law of thermodynamics
• C. Second law of thermodynamics
• C. N-m
• D. Third law of thermodynamics
58. Who formulated the zeroth law of thermodynamics in 1931?
• A. A. Celsuis
• B. A. Einstein
• C. R.H. Fowler
• D. G. Fahrenheit
59. What is the thermodynamic temperature scale in the SI system?
• A. Kelvin scale
• B. Celsius scale
• C. Fahrenheit scale
• D. Rankine scale
60. What is the thermodynamic temperature scale in the English system?
• A. Kelvin scale
• B. Celsius scale
• C. Fahrenheit scale
• D. Rankine scale
61. What temperature scale is identical to the Kelvin scale?
• A. Ideal gas temperature scale
• B. Ideal temperature scale
• C. Absolute gas temperature scale
• D. Triple point temperature scale
62. The temperatures of the ideal gas temperature scale are measured by using a .
• A. Constant-volume gas thermometer
• B. Constant-mass gas thermometer
• C. Constant-temperature gas thermometer
• D. Constant-pressure gas thermometer
63. What refers to the strong repulsion between the positively charged nuclei which makes fusion reaction difficult to attain?
• A. Atomic repulsion
• B. Nuclear repulsion
• C. Coulomb repulsion
• D. Charge repulsion
64. What gas thermometer is based on the principle that at low pressure, the temperature of a gas is proportional to its pressure at constant volume?
• A. Constant-pressure gas thermometer
• B. Isobaric gas thermometer
• C. Isometric gas thermometer
• D. Constant-volume gas thermometer
65. What is the state at which all three phases of water coexist in equilibrium?
• A. Tripoint of water
• B. Triple point of water
• C. Triple phase point of water
• D. Phase point of water
66. What is defined as the force per unit area?
• A. Pressure
• B. Energy
• C. Work
• D. Power
67. The unit “pascal” is equivalent to .
• A. N/m^2
• B. N/m
• D. N-m^2
68. Which of the following is NOT a value of the standard atmospheric pressure?
• A. 1 bar
• B. 1 atm
• C. 1 kgf/cm^2
• D. 14.223 psi
69. What is the SI unit of pressure?
• A. Atm
• B. Bar
• C. Pa
• D. Psi
70. 1 bar is equivalent to how many pascals?
• A. 10^3
• B. 10^4
• C. 10^5
• D. 10^6
71. 1 atm is equivalent to how many pascals?
• A. 101,325
• B. 101,689
• C. 101,102
• D. 101,812
72. What is considered as the actual pressure at a given position and is measured relative to absolute vacuum?
• A. Gage pressure
• B. Absolute pressure
• C. Atmospheric pressure
• D. Vacuum pressure
73. What is the pressure below atmospheric pressure called?
• A. Gage pressure
• B. Absolute pressure
• C. Atmospheric pressure
• D. Vacuum pressure
74. The difference between the absolute pressure and the atmospheric pressure is called the pressure.
• A. Gage
• B. Normal
• C. Standard
• D. Vacuum
75. Which of the following is NOT an instrument used to measure pressure?
• A. Bourdon tube
• B. Pitot tube
• C. Aneroid
• D. Manometer
76. What instrument is used to measure atmospheric pressure?
• A. Pitot tube
• B. Wind vane
• C. Barometer
• D. Manometer
77. Another unit used to measure atmospheric pressure is the “torr”. This is named after the Italian physicist, Evangelista Torrecelli. An average atmospheric pressure is how many torr?
• A. 740
• C. Internal heat
• B. 750
• C. 760
• D. 770
78. What states that for a confined fluid, the pressure at a point has the same magnitude in all directions?
• A. Avogadro’s Law
• B. Amagat Law
• C. Pascal’s Law
• D. Bernoulli’s Theorem
79. What pressure measuring device consists of a coiled hollow tube that tends to straighten out when the tube is subjected to an internal pressure?
• A. Aneroid
• B. Manometer
• C. Bourdon pressure gage
• D. Barometer
80. What is an energy that can be transferred from one object to another causing a change in temperature of each object?
• A. Power
• B. Heat transfer
• C. Heat
• D. Work
81. What is the SI unit of energy?
• A. Newton
• B. Btu
• C. Calorie
• D. Joule
82. One joule is equivalent to one .
• A. Kg ? m/ s^2
• B. Kg ? m^2/s^2
• C. Kg ? m^2/s
• D. Kg ? m/s
83. One calorie is equivalent to how many joules?
• A. 4.448
• B. 4.184
• C. 4.418
• D. 4.814
84. One erg is equivalent to how many joules?
• A. 10^-8
• B. 10^-7
• C. 10^-6
• D. 10^-5
85. The first law of thermodynamics is the:
• A. Law of conservation of momentum
• B. Law of conservation of mass
• C. Law of conservation of power
• D. Law of conservation of energy
86. What is the study of energy and its transformations?
• A. Thermostatics
• B. Thermophysics
• C. Thermochemistry
• D. Thermodynamics
87. What is considered as the heat content of a system?
• A. Enthalpy
• B. Entropy
• D. Molar heat
88. What refers to the amount of heat needed to raise the temperature of an object by one degree Celsius or 1K?
• A. Heat capacity
• B. Specific heat
• C. Latent heat
• D. Molar heat
89. What is the heat capacity of one mole of substance?
• A. Molecular heat
• B. Specific heat
• C. Latent heat
• D. Molar heat
90. What is the heat capacity of one gram of a substance?
• A. Molecular heat
• B. Specific heat
• C. Latent heat
• D. Molar heat
91. “The enthalpy change for any chemical reaction is independent of the intermediate stages, provided the initial and final conditions are the same for each route.” This statement is known as:
• A. Dulong’s Law
• B. Dalton’s Law
• C. Hess’s Law
• D. Petit Law
92. What refers to the measure of the disorder present in a given substance or system?
• A. Enthalpy
• B. Entropy
• C. Heat capacity
• D. Molar heat
93. Entropy is measured in .
• A. Joule/Kelvin
• B. Joule-Meter/Kelvin
• C. Meter/Kelvin
• D. Newton/Kelvin
94. What is the energy absorbed during chemical reaction under constant volume conditions?
• A. Entropy
• B. Ion exchange
• C. Enthalpy
• D. Enthalpy of reaction
95. When water exists in the liquid phase and is not about to vaporize, it is considered as liquid.
• A. Saturated
• B. Compressed or subcooled
• C. Superheated
• D. Unsaturated
96. A liquid that is about to vaporize is called liquid.
• A. Saturated
• B. Compressed or subcooled
• C. Superheated
• D. Unsaturated
97. A vapor that is about to condense is called vapor.
• A. Saturated
saturated vapor states are the same or identical?
• B. Compressed or subcooled
• C. Superheated
• D. Unsaturated
98. A vapor that is not about to condense is called vapor.
• A. Saturated
• B. Compressed or subcooled
• C. Superheated
• D. Unsaturated
99. A substance that has a fixed chemical composition is known as substance.
• A. Monoatomic
• B. Heterogeneous
• C. Homogeneous
• D. Pure
100. What refers to the temperature at which a pure substance changes phase at a given pressure?
• A. Equilibrium temperature
• B. Saturation temperature
• C. Superheated temperature
• D. Subcooled temperature
101. What refers to the pressure at which a pure substance changes phase at a given temperature?
• A. Equilibrium pressure
• B. Saturation pressure
• C. Superheated pressure
• D. Subcooled pressure
102. What is the amount of heat needed to turn 1 kg of the substance at its melting point from the solid to liquid state?
• A. Heat of fusion
• B. Heat of vaporation
• C. Heat of condensation
• D. Heat of fission
103. What is the amount of heat needed to turn 1kg of the substance at its boiling point from the liquid to the gaseous state?
• A. Heat of fusion
• B. Heat of vaporation
• C. Heat of condensation
• D. Heat of fission
104. What refers to the amount of energy absorbed or released during a phase-change process?
• A. Molar heat
• B. Latent heat
• C. Vaporization heat
• D. Condensation heat
105. What is the latent heat of fusion of water at 1 atm?
• A. 331.1 kJ/kg
• B. 332.6 kJ/kg
• C. 333.7 kJ/kg
• D. 330.7 kJ/kg
106. What is the latent heat of vaporization of water at 1 atm?
• A. 2314.8 kJ/kg
• B. 2257.1 kJ/kg
• C. 2511.7 kJ/kg
• D. 2429.8 kJ/kg
107. What refers to the point at which the saturated liquid and
• A. Triple point
• B. Inflection point
• C. Maximum point
• D. Critical point
