Question

1. Hot air rises - this causes upward heat transfer and is one of the most familiar forms of convection.

Why does air cool as it rises this way?

2. (H16.17) Since all objects emit energy to their surroundings, why don’t the temperatures of all

objects continuously decrease?

3. (H16.25) Does Newton’s law of cooling apply to warming a well as to cooling?

4. (H17.4) Why is evaporation a cooling process?

5. (H17.19) When will water boil at a temperature lower than 100 C?

6. (H17.27) Does a liquid release energy or absorb energy when it changes into a solid?

7. (H18.5) If we assume that the gas does not condense into a liquid, what volume is approached for

a gas at 0 C cooled by 273?

8. (H18.22) How does the second law relate to heat engines?

9. (H18.26) with respect to orderly and disorderly states, what do natural systems tend to do? Can

a disorderly state ever transform into an orderly state? Explain

Answer 1

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