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Q13 The vapour pressure of the ketone carvone (Mr = 150.2 g mol-1), a component of spearmint oil, is as follows: T / oC 57.4 100.4 133.0 157.3 203.5...

Q13 The vapour pressure of the ketone carvone (Mr = 150.2 g mol-1), a component of spearmint oil, is as follows:
T / oC 57.4 100.4 133.0 157.3 203.5 227.5
p/ Torr 1.00 10.0 40.0 100 400 760

The Clausius-Clapeyron equation can be written in the straight-line
form:
ln P = vap,m/R) 1/T + c
(where c is a constant, T is temperature measured in degrees Kelvin))
(a) Plot a suitable graph to determine the molar enthalpy of vaporisation vap,m ) of carvone. (12 marks)
(b) What is the normal boiling point of carvone?

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