Entropy of Gases and Gravity

The video explores the second law of thermodynamics, focusing on entropy as a measure of disorder. It illustrates this with examples of gas spreading in a box and stars clumping due to gravity. The discussion extends to the early universe, where both gravitational and other physical processes contribute to the observed uniformity and thermal equilibrium.

What does the second law of thermodynamics state about entropy?

• Entropy decreases over time.

• Entropy is unrelated to time.

• Entropy remains constant over time.

• Entropy increases over time.

In the context of the second law of thermodynamics, what happens when gas is released from a compartment in a box?

• The gas remains in the compartment.

• The gas spreads out uniformly in the box.

• The gas clumps together in the box.

• The gas disappears from the box.

How does gravity affect the distribution of stars in a galactic scale?

• Stars clump together irregularly.

• Stars disappear.

• Stars remain stationary.

• Stars spread out uniformly.

What is the relationship between gravity and entropy in a galactic scale?

• Gravity increases entropy by causing clumping.

• Gravity has no effect on entropy.

• Gravity reverses the second law of thermodynamics.

• Gravity decreases entropy.

What does the uniformity of radiation in the early universe indicate?

• A state of thermal equilibrium.

• A decrease in entropy.

• An increase in disorder.

• A lack of thermal equilibrium.