Thermodynamics

What does the first law of thermodynamics state about internal energy?

• It decreases as the system performs work.

• It remains constant regardless of heat or work.

• It equals the sum of work done on the system and heat transferred.

• It is only affected by temperature.

What happens in an isobaric process?

• Temperature remains constant as volume changes.

• Volume remains constant as heat is added.

• Pressure increases as heat is added.

• Volume and temperature decrease as heat is removed.

How is work calculated in an isobaric process?

• Volume divided by the change in pressure.

• Temperature change times the volume change.

• Pressure multiplied by the change in volume.

• Heat added minus the internal energy change.

What does the second law of thermodynamics state about entropy?

• Entropy in a system can decrease without conditions.

• Entropy of a system always decreases over time.

• Entropy of the universe always increases.

• Entropy does not affect energy transfer.

What is the relationship between entropy and heat flow?

• Heat flows from cooler to warmer systems naturally.

• Heat flows from warmer to cooler systems, increasing entropy.

• Heat flows to decrease entropy.

• Heat does not affect entropy.