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The First Law of Thermodynamics Practice Questions

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The following physics revision questions are provided in support of the physics tutorial on The First Law of Thermodynamics. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the The First Law of Thermodynamics tutorials. The The First Law of Thermodynamics calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Thermodynamics Learning Material
Tutorial IDTitleTutorialVideo
Tutorial		Revision
Notes		Revision
Questions
13.5The First Law of Thermodynamics

Physics Revision Questions for The First Law of Thermodynamics

1) 170 J of heat energy are supplied to a gas sample. As a result, the internal energy of the gas increased by 200 J. What is the WORK DONE ON THE GAS by the surroundings?

  1. 30 J
  2. -30 J
  3. 370 J
  4. -370 J

Correct Answer: A

2) The internal energy of a gas inside a cylinder during an adiabatic process increases by 20 J. What happens to the 4-kg piston of the cylinder during this process? Take g = 10 m/s2 if needed.

  1. Rises up by 50 cm
  2. Lowers down by 50 cm
  3. Rises up by 5 m
  4. Lowers down by 5 m

Correct Answer: D

3) The graph below is an example of

Physics Tutorials: This image provides visual information for the physics tutorial The First Law of Thermodynamics
  1. Adiabatic process
  2. Free expansion process
  3. Constant volume process
  4. Cyclic process

Correct Answer: B

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  2. Thermodynamics Physics tutorial: The First Law of Thermodynamics. Read the The First Law of Thermodynamics physics tutorial and build your physics knowledge of Thermodynamics
  3. Thermodynamics Revision Notes: The First Law of Thermodynamics. Print the notes so you can revise the key points covered in the physics tutorial for The First Law of Thermodynamics
  4. Check your calculations for Thermodynamics questions with our excellent Thermodynamics calculators which contain full equations and calculations clearly displayed line by line. See the Thermodynamics Calculators by iCalculator™ below.
  5. Continuing learning thermodynamics - read our next physics tutorial: The Kinetic Theory of Gases. Ideal Gases

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