In which process does the entropy of a system decrease?

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Question: In which process does the entropy of a system decrease?

Options:

Correct Answer: Adiabatic compression

Solution:

In adiabatic compression, the entropy of the system decreases as work is done on the gas, increasing its temperature without heat exchange.

In which process does the entropy of a system decrease?

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.

Entropy – Entropy is a measure of the disorder or randomness in a system, and it typically increases in natural processes.
Adiabatic Process – An adiabatic process is one in which no heat is exchanged with the surroundings, and changes in internal energy are due to work done on or by the system.
Compression – Compression of a gas can lead to an increase in temperature and a decrease in entropy if it occurs without heat exchange.