Second law of Thermodynamics

Which of the following is the best definition of entropy?

• increase in disorganization within a system

• an energetically favorable reaction

• increase in the concentration of a substance in a solution

• a friction-free system

• increase in organization within a system

The aging of our bodies over time is an example of which of the following?

• Newton's Second Law

• Newton's First Law

• First Law of Thermodynamics

• Second Law of Thermodynamics

• Third Law of Thermodynamics

Which of the following is the best definition of energy?

• ability to do work

• anything that has mass and takes up space

• mode of operation

• distance moved in a period of time

• movement of an object with application of force

What happens to the amount of usable energy in a system over time?

• remains constant

• increases until the heat of friction equal the original potential energy in the system

• increases

• decreases

Which of the following is the best example of The Second Law of Thermodynamics?

• A bike parked at the top of a hill has stored potential energy

• A bike rolling down a hill has kinetic energy

• Water flowing over a dam is used to generate electricity

• Some of the potential energy stored in gasoline is lost as heat when burned in a car's engine

Which of the following correctly describes the entropy changes of the water molecules and the universe when a sample of water freezes?

• A

• B

• C

• D

Which of the following statements is in agreement with the second law of thermodynamics?

• It is possible to continuously convert thermal energy fully into work.

• In natural processes, local entropy must increase.

• Thermal energy will not flow by itself from cold to hot bodies.

• The entropy in a closed system tends to decrease.

An operating refrigerator with its door open is placed in a thermally insulated room.

The refrigerator operates for a long period of time. Which of the following correctly gives the change in temperature and the entropy of the air in the room?

• A

• B

• C

• D