Question

In: Chemistry

The smell of a pine tree is easily recognized. The scent is primarily due to the...

The smell of a pine tree is easily recognized. The scent is primarily due to the organic compound called pinene. If you generate the graph of the natural log of the vapor pressure vs. the reciprocal of the absolute temperature, the equation of the line is the Clausius Clapeyron equation. For pinene, this graph has a slope of -4936.37K. Determine the enthalpy of vaporization (kJ/mol) for pinene.

Solutions

Expert Solution

OR is known as Clausius-Clapeyron equation.   

Integrated form of Clausius-Clapeyron equation is given as :

IF 1atm, then represents automatically the normal boiling point(sublimation) of the liquid(or solid) phase, representing by ,

just ignoring the subscript 2

Now if we will plot ln(p/atm) versus 1/T, we will get a linera graph with slope equal to - as shown below.

slope = = -4936.37K

therefore, 4936.37K x 8.314JK-1mol-1

   41040.98 Joule/mol

   41.04098 KJ/mol


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