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In a process where 300 J of heat is added to a system and the system does 100 J

Practice Questions

Q1
In a process where 300 J of heat is added to a system and the system does 100 J of work, what is the change in internal energy?
  1. 200 J
  2. 100 J
  3. 300 J
  4. 400 J

Questions & Step-by-Step Solutions

In a process where 300 J of heat is added to a system and the system does 100 J of work, what is the change in internal energy?
  • Step 1: Identify the amount of heat added to the system, which is 300 J. This is represented as Q.
  • Step 2: Identify the amount of work done by the system, which is 100 J. This is represented as W.
  • Step 3: Use the first law of thermodynamics formula, which is ΔU = Q - W.
  • Step 4: Substitute the values into the formula: ΔU = 300 J - 100 J.
  • Step 5: Calculate the result: ΔU = 200 J.
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