Assignment 2 (Thermodynamics)

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10 Questions - Developed by: Gustav Söderkvist - Developed on: - 1.680 taken

  • 1
    An ideal gas goes from 10 atm and 50°C to 1 atm and 100°C by two paths. Path A is reversible, it is a constant volume step followed by a constant pressure step. Path B is irreversible, and is a constant pressure step followed by a constant volume step. Which path has the larger change in internal energy of the gas?
  • 2
    An inventor claims that she/he can convert 1000 J of heat into 1000 J of work. Does this violate the second law of thermodynamics?
  • 3
    An ideal gas is compressed adiabatically and irreversibly. The final temperature of this process relative to that for an adiabatic reversible process to the same final pressure is ____________.
  • 4
    Air is contained in a sealed tank of fixed volume. The air in the tank is initially at 20°C and 1 atm. It is then heated to 250°C. The internal energy of the air in the container ___________. Assume the air to be an ideal gas.
  • 5
    How can the efficiency of a refrigerator be increased?
  • 6
    How can we increase the efficiency of an automobile engine (Otto Engine)?
  • 7
    We got two different heat engines; one operates reversably and the other irreversibly. Which one has higher efficiency?
  • 8
    An ideal gas is at 27°C. It gets heated up at constant pressure and as a result its volume gets doubled. What is the approximate final temperature of the gas?
  • 9
    In an Isothermal path, which variables do not change during the path?
  • 10
    A gas goes through 2 different paths (isothermal and/or Adiabatic) to decrease the pressure from P1 to P2 as shown in the figure. Among the two paths shown in this figure, which one is Adiabatic?
    A gas goes through 2 different paths (isothermal and/or Adiabatic) to decrease the pressure from P1 to P2 as shown in the figure. Among the two paths

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