enthalpy of vaporization of pinene. slope of –4936.37 K

enthalpy of vaporization of pinene. slope of –4936.37 K

 

 

The smell of fresh-cut pine is due in part to a cyclic alkene called pinene. A graph of the natural logarithm of the vapor pressure of pinene vs. 1/temperature produces a straight line with a slope of –4936.37 K. What is the enthalpy of vaporization of pinene?

 

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From Clausius-Clapeyron 식,

Slope = –ΔH_vap / R

( 참고 https://ywpop.tistory.com/3133 )

 

 

 

ΔH_vap = –Slope × R

= –(–4936.37 K) × (8.314 J/mol•K)

= 41041 J/mol

= 41 kJ/mol

 

 

 

 

[키워드] 증기압 곡선의 기울기 기준문서, Clausius-Clapeyron 식 기준문서