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Using the First Law of Thermodynamics to Calculate Work Done

  • 1.

    If 500 J of heat is added to the system and the internal energy of the system is reduced by 200 J. Calculate the work done by the system.

    Answers:

    • 200 J

    • 500 J

    • 700 J

    • 300 J

  • 2.

    If 500 J of heat is removed from the system and the internal energy of the system is increased by 200 J. Calculate the work done on the system.

    Answers:

    • -500 J

    • 200 J

    • -700 J

    • 300 J

  • 3.

    Calculate the work done by the gas if the internal energy of the gas increases by 300 J when 800 J of heat is supplied to it.

    Answers:

    • 300 J

    • 500 J

    • -500 J

    • -300 J

  • 4.

    Calculate the work done on the gas if the internal energy of the gas increases by 300 J when 800 J of heat is rejected by the gas to the surrounding.

    Answers:

    • 1100 J

    • -500 J

    • 500 J

    • -1100 J

  • 5.

    A system absorbs 100 kJ as heat. Calculate the work done by the system if the internal energy of the system increased by 50 kJ.

    Answers:

    • 50 kJ

    • -50 kJ

    • 150 kJ

    • -150 kJ

  • 6.

    When a gas in a closed container is heated with 50 J of energy, the container's lid rises. How much work was done by the system if the change in energy of the system was 30 J?

    Answers:

    • 10 J

    • 20 J

    • 30 J

    • 50 J

  • 7.

    When 100 J of heat is supplied to a gaseous system, the internal energy of the system increased by 40 J. The work done by the system is

    Answers:

    • 100 J

    • 60 J

    • 40 J

    • 50 J

  • 8.

    A thermal system rejects 50 J of energy to the surrounding. If the internal energy of the system decreases by 70 J, calculate the work done by the system.

    Answers:

    • 10 J

    • 50 J

    • 30 J

    • 20 J

  • 9.

    In a thermodynamic process, a gas receives 200 Joules of heat and its internal energy decreases by 300 J. Calculate the work done by the gas.

    Answers:

    • 200 J

    • 100 J

    • 500 J

    • 400 J

  • 10.

    If the internal energy of a system is increased by 100 J when 200 J of heat is supplied to the system. Calculate the work done by the system.

    Answers:

    • 400 J

    • 300 J

    • 100 J

    • 200 J

  • 11.

    When interacting with the surrounding, a gas loses 200 J of heat. Calculate the work done by the gas if the internal energy of the gas decreased by 400 J.

    Answers:

    • 200 J

    • 400 J

    • 500 J

    • 600 J

  • 12.

    When a system receives 560 J of heat, it loses 360 J of internal energy. Calculate how much work the system has done.

    Answers:

    • +920 J

    • -260 J

    • +300 J

    • -920 J

  • 13.

    A gas loses 400 J of heat as it interacts with its surroundings. Calculate how much work the gas did if its internal energy was reduced by 600 J.

    Answers:

    • 300 J

    • 400 J

    • 100 J

    • 200 J

  • 14.

    In an isothermal process, the change in the internal energy of the system is zero. Calculate the work done by the system if the heat absorbed from the surrounding is 280 J.

    Answers:

    • 200 J

    • 0 J

    • 280 J

    • 140 J

  • 15.

    A container full of gas absorbs 500 J of heat from the heating source. The internal energy of the gas increases by 200 J. Calculate the work done by the gas.

    Answers:

    • -300 J

    • 200 J

    • -200 J

    • 300 J

  • 16.

    A system rejects 200 kJ in the form of heat. Calculate how much work the system does if its internal energy is decreased by 250 kJ.

    Answers:

    • 150 kJ

    • 450 kJ

    • 200 kJ

    • 50 kJ

  • 17.

    When a gaseous system receives 70 J of heat, the internal energy of the system increases by 30 J. Calculate the work done by the system.

    Answers:

    • 70 J

    • 30 J

    • 100 J

    • 40 J

  • 18.

    As a gas interacts with its environment, it loses 500 J of heat. Calculate how much work the gas accomplished after losing 700 J of internal energy.

    Answers:

    • 500 J

    • 200 J

    • 1200 J

    • 300 J

  • 19.

    In the form of heat, a system rejects 180 kJ. Calculate how much work the system accomplishes if it loses 250 kJ of internal energy.

    Answers:

    • 70 kJ

    • 110 kJ

    • 250 kJ

    • 180 kJ

  • 20.

    A gas obtains 100 Joules of heat through a thermodynamic process, and its internal energy is reduced by 300 J. Calculate how much work the gas has done.

    Answers:

    • 100 J

    • 300 J

    • 200 J

    • 400 J

  • 21.

    During the compression process, the internal energy of the gas is increased by 400 J. Calculate the work done by the compressor on the gas if 250 J of heat is supplied to it.

    Answers:

    • -150 J

    • 650 J

    • +150 J

    • 250 J

  • 22.

    The amount of heat rejected by the engine is 260 kJ. Calculate the work done by the gas if the internal energy of the engine decreases by 350 kJ.

    Answers:

    • 260 kJ

    • 150 kJ

    • 350 kJ

    • 90 kJ

  • 23.

    In the form of heat, a system rejects 300 kJ. Calculate how much work the system accomplishes if it loses 350 kJ of internal energy.

    Answers:

    • 250 kJ

    • 50 kJ

    • 200 kJ

    • 650 kJ

  • 24.

    600 J of heat from the heating source is absorbed by a container filled with gas. The gas's internal energy increases by 400 J. Calculate the work done by the gas.

    Answers:

    • 400 J

    • 600 J

    • 300 J

    • 200 J

  • 25.

    The container's lid raises when gas in a closed container is heated with 100 J of energy. If the increase in the system's internal energy change was 30 J, how much work was done by the system?

    Answers:

    • 100 J

    • 30 J

    • 130 J

    • 70 J

  • 26.

    During the compression process, the gas's internal energy is increased by 500 J. Calculate how much work the compressor does on the gas when it receives 350 J of heat.

    Answers:

    • +150 J

    • -150 J

    • -550 J

    • +50 J

  • 27.

    A system absorbs 110 kJ in the form of heat. Calculate how much work the system does if its internal energy is raised by 90 kJ.

    Answers:

    • 20 kJ

    • 200 kJ

    • 90 kJ

    • 110 kJ

  • 28.

    If the system loses 400 J of heat and gains 100 J of internal energy. Calculate the system's work.

    Answers:

    • -300 J

    • -500 J

    • +200 J

    • -200 J

  • 29.

    The internal energy of the gas is raised by 500 J during the compression process. Calculate how much work the compressor does on the gas if 450 J of heat is supplied to it.

    Answers:

    • +50 J

    • -450 J

    • +500 J

    • -50 J

  • 30.

    If the system gains 600 J of heat and gains 100 J of internal energy. Calculate the system's work.

    Answers:

    • +500 J

    • -500 J

    • +700 J

    • -700 J

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