Second Law of Thermodynamics

Which of the following is a false statement?

• Entropy is a quantitative measure of disorder.

• The entropy of an isolated system must be conserved (it remains constant)

• Entropy can be measured in units of J/K

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NGSS.HS-PS3-4

When ice melts into water spontaneously, the entropy of the universe decreases.

• True

• False

During a phase change from liquid to gas, what happens to the entropy of the substance?

• The entropy significantly decreases.

• The entropy slightly decreases.

• The entropy remains constant.

• The entropy significantly increases.

Hot steel ball bearings are dropped into a large bucket of cool water. Which graph BEST represents the changes in temperature that will occur?

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NGSS.HS-PS3-4

When water at 0°C freezes, the entropy of the water

• decreases

• increases

• remains constant

• becomes negative

What is the main concept introduced by the Second Law of Thermodynamics?

• Thermal equilibrium

• Energy conservation

• Entropy

• Absolute zero

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NGSS.HS-PS3-4

What happens to the entropy of an isolated system over time, according to the Second Law of Thermodynamics?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates.

What is an example of the Second Law of Thermodynamics in daily life?

• Using a refrigerator to move heat from inside to outside.

• Converting fuel into mechanical energy in a car engine.

• An ice cube melting at room temperature.

• Generating electricity in a power plant.

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NGSS.HS-PS3-4

What is Thermodynamics?

• Science of Energy Transfer

• Effect of energy transfer on the physical properties

• All are correct

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NGSS.HS-PS1-4

NGSS.HS-PS1-5

NGSS.HS-PS3-2

NGSS.HS-PS3-4

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.

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NGSS.HS-PS3-2

NGSS.HS-PS3-4