The following information is given for ether, C₂H5OC₂H5, at 1atm: AHvap(34.6 °C) = 26.5 kJ/mol boiling point = 34.6 °C specific heat liquid = 2.32 J/gºC At a pressure of 1 atm, 34.6 °C. kj of heat are needed to vaporize a 46.4 g sample of liquid ether at its normal boiling point of

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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.