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Entropy and the Second Law

Entropy and the Second Law Quiz

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Questions

Question 1 Multiple Choice (Single Answer)

What is the SI unit of entropy?

  1. Joule per Kelvin
  2. Kelvin per Joule
  3. Joule
  4. Kelvin
Question 2 Multiple Choice (Single Answer)

What is the formula for the change in entropy?

  1. $dS = rac{dQ}{T}$
  2. $dS = rac{dQ}{T^2}$
  3. $dS = rac{dQ}{T^3}$
  4. $dS = rac{dQ}{T^4}$
Question 3 Multiple Choice (Single Answer)

What is the second law of thermodynamics?

  1. The total entropy of an isolated system always increases.
  2. The total entropy of an isolated system always decreases.
  3. The total entropy of an isolated system remains constant.
  4. The total entropy of an isolated system can increase or decrease.
Question 4 Multiple Choice (Single Answer)

What is the Clausius statement of the second law of thermodynamics?

  1. Heat cannot flow spontaneously from a colder to a hotter body.
  2. Heat can flow spontaneously from a hotter to a colder body.
  3. Heat can flow spontaneously from a colder to a hotter body if work is done.
  4. Heat can flow spontaneously from a hotter to a colder body if work is done.
Question 5 Multiple Choice (Single Answer)

What is the Kelvin statement of the second law of thermodynamics?

  1. It is impossible to construct a heat engine that, operating in a cycle, absorbs energy from a reservoir and does an equivalent amount of work without rejecting some of the energy to a colder reservoir.
  2. It is possible to construct a heat engine that, operating in a cycle, absorbs energy from a reservoir and does an equivalent amount of work without rejecting some of the energy to a colder reservoir.
  3. It is impossible to construct a refrigerator that, operating in a cycle, transfers heat from a colder reservoir to a hotter reservoir without the input of work.
  4. It is possible to construct a refrigerator that, operating in a cycle, transfers heat from a colder reservoir to a hotter reservoir without the input of work.
Question 6 Multiple Choice (Single Answer)

What is entropy?

  1. A measure of the disorder of a system.
  2. A measure of the energy of a system.
  3. A measure of the temperature of a system.
  4. A measure of the pressure of a system.
Question 7 Multiple Choice (Single Answer)

What is the relationship between entropy and heat?

  1. Entropy increases when heat is added to a system.
  2. Entropy decreases when heat is added to a system.
  3. Entropy remains constant when heat is added to a system.
  4. Entropy can increase or decrease when heat is added to a system.
Question 8 Multiple Choice (Single Answer)

What is the relationship between entropy and work?

  1. Entropy increases when work is done on a system.
  2. Entropy decreases when work is done on a system.
  3. Entropy remains constant when work is done on a system.
  4. Entropy can increase or decrease when work is done on a system.
Question 9 Multiple Choice (Single Answer)

What is the relationship between entropy and temperature?

  1. Entropy increases with temperature.
  2. Entropy decreases with temperature.
  3. Entropy remains constant with temperature.
  4. Entropy can increase or decrease with temperature.
Question 10 Multiple Choice (Single Answer)

What is the relationship between entropy and pressure?

  1. Entropy increases with pressure.
  2. Entropy decreases with pressure.
  3. Entropy remains constant with pressure.
  4. Entropy can increase or decrease with pressure.
Question 11 Multiple Choice (Single Answer)

What is the relationship between entropy and volume?

  1. Entropy increases with volume.
  2. Entropy decreases with volume.
  3. Entropy remains constant with volume.
  4. Entropy can increase or decrease with volume.
Question 12 Multiple Choice (Single Answer)

What is the relationship between entropy and chemical reactions?

  1. Entropy increases during chemical reactions.
  2. Entropy decreases during chemical reactions.
  3. Entropy remains constant during chemical reactions.
  4. Entropy can increase or decrease during chemical reactions.
Question 13 Multiple Choice (Single Answer)

What is the relationship between entropy and phase transitions?

  1. Entropy increases during phase transitions.
  2. Entropy decreases during phase transitions.
  3. Entropy remains constant during phase transitions.
  4. Entropy can increase or decrease during phase transitions.
Question 14 Multiple Choice (Single Answer)

What is the relationship between entropy and black holes?

  1. Entropy increases inside black holes.
  2. Entropy decreases inside black holes.
  3. Entropy remains constant inside black holes.
  4. Entropy can increase or decrease inside black holes.
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