unit 7 --- 2nd and 3rd Laws of Thermodynamics

Multiple Choice

What determines whether a process is reversible?

• heat

• power

• entropy

• directionality

Multiple Choice

Which type of substance has the most entropy?

• solid

• liquid

• gas

Multiple Choice

Total entropy can only ________ or remain the same.

• increase

• decrease

Multiple Choice

Which statement describes this equation?

• Divide the energy by the entropy and it equals the heat.

• Multiply the energy by the entropy and you know the heat transfer.

• Divide the heat by the temperature and it equals the entropy.

Multiple Choice

What does the increase in entropy cause?

• a change in the amount of friction

• a difference between time moving forward and backward

• a loss of heat energy

Multiple Choice

When does heat flow?

• when entropy is high

• when there is a temperature difference

• when the system has reached thermal equilibrium

Multiple Choice

An ideal system does not contain ______.

• friction

• entropy

• heat

• power

Multiple Choice

Which law of thermodynamics can be referred to as "the arrow of time"?

• 1st

• 2nd

• 3rd

• Zeroth

Multiple Choice

Why does a hot gas have a large entropy?

• the reversibility of time in the quantum world

• all the possible microstates of the particles of gas

• the increasing friction between the particles

Multiple Choice

Which law of thermodynamics establishes absolute zero as the temperature at which the entropy of a system is zero?

• 1st

• 2nd

• 3rd

• Zeroth

Multiple Choice

Which type of system has no thermal energy?

• a quantum system

• a system with no friction

• a system at absolute zero

Multiple Choice

The change in energy of a system equals the heat added to it plus the work done on it.

• Zeroth

• 3rd

• 1st

• 2nd