13. The vapor pressure of solid benzene is 2.24 mm Hg. at -30 C and 24.5 mm Hg. at 0 C, and the vapor pressure of liquid benzene is 46.3 mm. Hg at 10 C and 118.5 mm Hg at 30 C. From these data, calculate: a) the heat of fusion of C6H6 b) the coordinates of the triple point.

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