Air conditioners not only cool air but dry it as well. A room in ahome measures 6.0 m * 10.0 m * 2.2 m. If the outdoortemperature is 30°C and the vapor pressure of water in the air is85% of the vapor pressure of water at this temperature, whatmass of water must be removed from the air each time thevolume of air in the room cycles through the air conditioner? Thevapor pressure for water at 30°C is 31.8 torr.

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.