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  • Question

  • The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.


  • Options
  • A. Boyle's law
  • B. Charle's law
  • C. Gay-Lussac law
  • D. Joule's law

  • Correct Answer
  • Joule's law 

    • Thermodynamics problems

    Search Results

    • 1. The throttling process is __________ process.

    • Options
    • A. reversible
    • B. irreversible
    • C. reversible or irreversible
      • Discuss
    • 2. A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

    • Options
    • A. -140 kJ
    • B. -80 kJ
    • C. -40 kJ
    • D. +60 kJ
      • Discuss
    • 3. The value of one bar (in S. I. units) is equal to

    • Options
    • A. 1 x 102 N/m2
    • B. 1 x 103 N/m2
    • C. 1 x 104 N/m2
    • D. 1 x 105 N/m2
      • Discuss
    • 4. A cycle consisting of two constant pressure and two isentropic processes is known as

    • Options
    • A. Carnot cycle
    • B. Stirling cycle
    • C. Otto cycle
    • D. none of these
      • Discuss
    • 5. In S. I. units, the value of the universal gas constant is

    • Options
    • A. 8.314 J/kg mole-K
    • B. 83.14 J/kgmole-K
    • C. 831.4 J/kgmole-K
    • D. 8314 J/kgmole-K
      • Discuss
    • 6. When a system changes its state from one equilibrium state to another equilibrium state, then the path of successive states through which the system has passed, is known as

    • Options
    • A. thermodynamic law
    • B. thermodynamic process
    • C. thermodynamic cycle
    • D. none of these
      • Discuss
    • 7. The change of entropy, when heat is absorbed by the gas, is

    • Options
    • A. positive
    • B. negative
    • C. positive or negative
      • Discuss
    • 8. Which of the following is the extensive property of a thermodynamic system?

    • Options
    • A. Pressure
    • B. Volume
    • C. Temperature
    • D. Density
      • Discuss
    • 9. Second law of thermodynamics defines

    • Options
    • A. heat
    • B. work
    • C. internal energy
    • D. entropy
      • Discuss
    • 10. The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

    • Options
    • A. enthalpy
    • B. internal energy
    • C. entropy
    • D. external energy
      • Discuss

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