Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at is 130 oC

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Benzoic acid, C6H5COOH, melts at 122 oC. The density in the liquid state at is 130 oC is 1.08 g/cm3. The density of solid benzoic acid at 15 oC is 1.266 g/cm3.
(a) In which of these two states is the average distance between molecules greater?
(b) Explain the difference in densities at the two temperatures in terms of the relative kinetic energies of the molecules?
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Chemistry The Central Science

ISBN: 978-0321696724

12th edition

Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward

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