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What is the change in internal energy of a gas that absorbs 300 J of heat and do

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Question: What is the change in internal energy of a gas that absorbs 300 J of heat and does 100 J of work on the surroundings? (2020)

Options:

  1. 200 J
  2. 300 J
  3. 400 J
  4. 500 J

Correct Answer: 200 J

Exam Year: 2020

Solution: 

Change in internal energy (ΔU) = Q - W = 300 J - 100 J = 200 J.

What is the change in internal energy of a gas that absorbs 300 J of heat and do

Practice Questions

Q1
What is the change in internal energy of a gas that absorbs 300 J of heat and does 100 J of work on the surroundings? (2020)
  1. 200 J
  2. 300 J
  3. 400 J
  4. 500 J

Questions & Step-by-Step Solutions

What is the change in internal energy of a gas that absorbs 300 J of heat and does 100 J of work on the surroundings? (2020)
  • Step 1: Identify the amount of heat absorbed by the gas. In this case, it is 300 J.
  • Step 2: Identify the amount of work done by the gas on the surroundings. Here, it is 100 J.
  • Step 3: Use the formula for change in internal energy, 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 of the gas is 200 J.
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