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In which process does the entropy of a system decrease?

Practice Questions

Q1
In which process does the entropy of a system decrease?
  1. Isothermal expansion
  2. Adiabatic compression
  3. Isobaric heating
  4. Isothermal compression

Questions & Step-by-Step Solutions

In which process does the entropy of a system decrease?
  • Step 1: Understand what entropy is. Entropy is a measure of disorder or randomness in a system.
  • Step 2: Know that in most processes, entropy tends to increase. This is a natural tendency in thermodynamics.
  • Step 3: Learn about adiabatic processes. An adiabatic process is one where no heat is exchanged with the surroundings.
  • Step 4: In adiabatic compression, work is done on a gas, which increases its pressure and temperature.
  • Step 5: During this process, the gas's entropy can decrease because the work done on it organizes the particles more, reducing disorder.
  • Step 6: Conclude that adiabatic compression is a specific process where the entropy of the system decreases.
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