Second Law of Thermodynamics

In which of the following systems is entropy increasing?

• Putting together a puzzle

• Putting books on a shelf

• Breaking a plate

• Filling a jar of salt

Which state of H₂O  has the greatest entropy?

• Ice

• Water

• Vapor

Tags

NGSS.MS-PS1-4

The second law of thermodynamics leads us to conclude that

• the total energy of the universe is constant

• disorder in the universe is increasing with the passage of time.

• it is theoretically possible to convert heat into work with 100% efficiency

• the average temperature of the universe is increasing with the passage of time

Tags

NGSS.HS-PS3-4

In the transition from ice to water and then to steam, why does entropy increase?

• Molecular disorder increases

• Molecular randomness decreases

• Molecules are more energetic

• Molecules are more reactive

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NGSS.HS-PS3-4

In a melting ice cube, ___________ is the randomness or disorder of the system as it changes from solid to liquid.

• Temperature

• Heat

• Entropy

• Energy

The efficiency of an ideal machine is 100% but an actual machine's efficiency will always be less than 100%because of the second law of thermodynamics which states that

• energy is neither created or destroyed, it changes form

• energy is released into the environment as light energy.

• energy is released into the environment as thermal energy

• energy is released into the environment as sound energy.

Tags

NGSS.HS-PS3-4

A solid object heated to 120°C is placed inside a container of water at 37°C. What is the BEST explanation of the resulting change in temperature?

• The temperature of both the water and solid will decrease.

• The temperature of the solid will decrease and the water will decrease.

• The temperature of the water will remain constant; the temperature of the solid will decrease

• The temperature of the water will increase; the temperature of the solid will decrease.

Tags

NGSS.HS-PS3-4

In a closed room where a party is happening and everyone is dancing, the entropy of the room tends to ______________.

• increase

• decrease

• stay constant

• fluctuate wildly

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NGSS.HS-PS3-4

An ideal gas undergoes an isothermal expansion. During this process, its entropy

• increases

• decreases

• remains constant

• becomes negative

Which of the following statements best describes the Second Law of Thermodynamics?

• Energy cannot be created or destroyed, only transformed.

• The entropy of an isolated system always increases over time.

• The total energy of a system remains constant.

• Heat flows from a colder body to a hotter body spontaneously.

Tags

NGSS.HS-PS3-4