Chapter 3: Q26DQ (page 574)
Some folks claim that ice cubes freeze faster if the trays are filled with hot water, because hot water cools off faster than cold water . What do you think?
Yes, the claim is true. A larger temperature difference means faster heat transfer.
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A constant-volume gas thermometer registers an absolute pressure corresponding to 325 mm of mercury when in contact with water at the triple point. What pressure does it read when in contact with water at the normal boiling point?
Like the Kelvin scale, the Rankinescaleis an absolute temperature scale: Absolute zero is zero degrees Rankine (0ºR). However, the units of this scale are the same size as those of the Fahrenheit scale rather than the Celsius scale. What is the numerical value of the triple-point temperature of water on the Rankine scale?
The pressure of a gas at the triple point of water is 1.35 atm. If its volume remains unchanged, what will its pressure be at the temperature at which CO2 solidifies?
Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pressure and temperature are constant. Is this inconsistent? Why or why not?
When you blow on the back of your hand with your mouth wide open, your breath feels warm. But if you partially close your mouth to form an “o” and then blow on your hand, your breath feels cool. Why?
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