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A process absorbs 300 J of heat and does 100 J of work. What is the change in in

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Question: A process absorbs 300 J of heat and does 100 J of work. What is the change in internal energy (ΔU)?

Options:

  1. 200 J
  2. 300 J
  3. 400 J
  4. 100 J

Correct Answer: 200 J

Solution: 

ΔU = q - W = 300 J - 100 J = 200 J.

A process absorbs 300 J of heat and does 100 J of work. What is the change in in

Practice Questions

Q1
A process absorbs 300 J of heat and does 100 J of work. What is the change in internal energy (ΔU)?
  1. 200 J
  2. 300 J
  3. 400 J
  4. 100 J

Questions & Step-by-Step Solutions

A process absorbs 300 J of heat and does 100 J of work. What is the change in internal energy (ΔU)?
  • Step 1: Identify the heat absorbed by the process. In this case, it is 300 J.
  • Step 2: Identify the work done by the process. Here, it is 100 J.
  • Step 3: Use the formula for change in internal energy (ΔU), which is ΔU = q - W.
  • Step 4: Substitute the values into the formula: ΔU = 300 J - 100 J.
  • Step 5: Calculate the result: 300 J - 100 J = 200 J.
  • Step 6: Conclude that the change in internal energy (ΔU) is 200 J.
  • First Law of Thermodynamics – The change in internal energy of a system is equal to the heat added to the system minus the work done by the system.
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