ism_ch16 - Chapter 16 Temperature and Heat Answers to...

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343 Chapter 16 Temperature and Heat Answers to Even-numbered Conceptual Questions 2. No. The Kelvin temperature is always 273.15 degrees greater than the Celsius temperature. 4. No. Heat is not a quantity that one object has more of than another. Heat is the energy that is transferred between objects of different temperatures. 6. In this case, the volume within the glass would increase more than the volume of the mercury would increase. As a result, the mercury level would drop with increasing temperature. 8. The mercury level drops at the beginning because the glass is the first to increase its temperature when it comes into contact with the hot liquid. Therefore, the glass expands before the mercury, leading to a drop in level. As the mercury rises to the same temperature a few moments later, its level will increase. 10. Heating the glass jar and its metal lid to the same higher temperature results in a greater expansion in the lid than in the glass. As a result, the lid can become loose enough to turn. 12. (a) The measurements of the tape measure are too long, because the distance between tick marks on the measure has decreased. Therefore, the cool tape measure shows more tick marks between two points than should be the case. 14. As the temperature of the house decreases, the length of the various pieces of wood from which it is constructed will decrease as well. As the house adjusts to these changing lengths, it will often creak or groan. 16. The rod will be firmly wedged in the ring. Recall that the cool rod starts out fitting snugly inside the hot ring. As the ring and the rod come to room temperature, the ring shrinks and the rod expands. The result is a very tight fit. 18. The final temperature will be considerably closer to the initial water temperature, T w , than to the initial alcohol temperature, T a . The reason is that as heat flows from the water to the alcohol, the temperature of the alcohol increases more rapidly than the temperature of the water decreases. It follows that when the alcohol and water have the same temperature, it will be a temperature closer to the initial temperature of the water. 20. This could happen if the objects have the same mass but different specific heats. Similarly, it could happen if the objects have the same specific heat but different masses. Bottom line: The objects must have different heat capacities. 22. Both the metal and the wood are at a lower temperature than your skin. Therefore, heat will flow from your skin to both the metal and the wood. The metal feels cooler, however, because it has a greater thermal conductivity. This allows the heat from your skin to flow to a larger effective volume than is the case with the wood.
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Chapter 16: Temperature and Heat Physics: An Introduction 24. As the ground warms up during the day, the ground of the surrounding suburbs warms up faster, since it has a smaller specific heat. This would lead to a wind blowing from the city to the suburbs. Of course, if the city is warmer than the suburbs – due to factories and cars – then the winds would blow into the city instead.
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ism_ch16 - Chapter 16 Temperature and Heat Answers to...

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