Practice Second Law Of Thermodynamics (B.4.2) - Theme B: The Particulate Nature of Matter

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8 questions

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6 sample questions

Question 1.
What is entropy?
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Think about disorder in different objects.
Question 2.
State the Second Law of Thermodynamics.
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Consider what happens to order in natural processes.
3Question 3.
What happens to the total entropy of a closed system over time?
- It decreases.
- It remains constant.
- It increases.
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Think about the natural tendency toward disorder.
4Question 4.
True or False: Heat can spontaneously flow from a colder body to a hotter body.
- True
- False
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Recall the direction of heat transfer.
Question 5.
Explain how the Second Law of Thermodynamics can affect the efficiency of engines and refrigerators.
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Consider the heat exchanges in these devices.
Question 6.
Calculate the change in entropy when 2 kg of ice at -5°C melts and warms to 0°C.
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You'll need to apply the latent heat formula for the melting.

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