Entropy

Front

What is entropy?

Back

Entropy is a measure of the disorder or randomness of a system.

Front

What does a small S value indicate about a system?

Back

A small S value indicates that the system has more order.

Front

How does entropy change from solid to liquid to gas?

Back

Entropy increases as the state changes from solid to liquid to gas due to increased molecular disorder.

Front

Which phase of matter has the greatest motion and least orderly arrangement?

Back

Gas has the greatest motion and least orderly arrangement.

Front

What process is accompanied by a decrease in entropy?

Back

The condensing of water vapor is accompanied by a decrease in entropy.

Front

What is the relationship between temperature and entropy?

Back

As temperature increases, the entropy of a system generally increases.

Front

What is the second law of thermodynamics?

Back

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.

Front

How does mixing two gases affect entropy?

Back

Mixing two gases increases the entropy of the system due to the increased randomness of the arrangement.

Front

What is the significance of entropy in chemical reactions?

Back

Entropy helps predict the spontaneity of chemical reactions; reactions tend to favor an increase in entropy.

Front

What is a reversible process in terms of entropy?

Back

A reversible process is one that can occur without an increase in the total entropy of the system and surroundings.