Practice Phase Changes And Latent Heat (2.4) - Thermal Physics

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define latent heat.
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Think about what happens during melting or boiling.
Question 2.
What is the latent heat of fusion?
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Consider the process of ice turning into water.
3Question 3.
What is latent heat?
- A. Heat required for temperature change
- B. Heat required for phase change
- C. Heat without energy transfer
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Think about the process of melting or boiling.
4Question 4.
True or False: Latent heat of fusion applies when a liquid freezes.
- True
- False
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Consider the definition of latent heat.
Question 5.
A pot contains 3 kg of water at 25°C. How much energy needs to be added to raise it to boiling point and then completely vaporize it? Specific heat of water = 4.18 kJ/kg°C and latent heat of vaporization is 2260 kJ/kg.
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Break it into two phases: heating to boil and then vaporizing.
Question 6.
Explain how the concept of latent heat is pivotal for climate control in urban areas.
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Consider both air conditioning and heating systems in urbanization.

4 more questions in this section. Enroll free to practise them all.