Chapter 16: Q113 AE (page 704)
When a person has a severe fever, one therapy used to reduce the fever is an “alcohol rub.” Explain how the evaporation of alcohol from a person’s skin removes heat energy from the body.
Evaporation causes cooling. Evaporation is an endothermic process.
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Describe what is meant by dynamic equilibrium in terms of the vapor pressure of a liquid.
Define the following terms, and describe how each depends on the strength of the intermolecular forces.
a. surface tension d. boiling point
b. viscosity e. vapor pressure
c. melting point
Use the heating–cooling curve below to answer the following questions.
a. What is the freezing point of the liquid?
b. What is the boiling point of the liquid?
c. Which is greater, the heat of fusion or the heat of vaporization? Explain each term, and explain how the heating–cooling curve above helps you to answer the question.
What type of solid will each of the following substances form?
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An ice cube tray contains enough water at to make ice cubes, each of which has a mass of The tray is placed in a freezer that uses as a refrigerant. The heat of vaporization of is . What mass of must be vaporized in the refrigeration cycle to convert all the water at role="math" localid="1663780868172" to ice at ? The heat capacities for and are and respectively, and the enthalpy of fusion for ice is .
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