벤젠의 증기압. C6H6 7.6℃ 40.1 mmHg 60.6℃ 31.0 kJ/mol

벤젠의 증기압. C6H6 7.6℃ 40.1 mmHg 60.6℃ 31.0 kJ/mol

 

 

The vapor pressure of benzene (C6H6) is 40.1 mmHg at 7.6°C.

What is its vapor pressure at 60.6°C?

The molar heat of vaporization of benzene is 31.0 kJ/mol.

 

---------------------------------------------------

 

클라우지우스-클라페이롱 식

ln(P1/P2) = ΔH_vap/R (1/T2 – 1/T1)

( 참고 https://ywpop.tistory.com/3133 )

 

 

 

T1 = 273.15 + 7.6 = 280.75 K, P1 = 40.1 mmHg

T2 = 273.15 + 60.6 = 333.75 K, P2 = ? mmHg

 

 

 

ln(40.1 / ?) = (31000 / 8.314) (1/333.75 – 1/280.75)

40.1 / ? = e^((31000 / 8.314) (1/333.75 – 1/280.75))

 

? = 40.1 / e^((31000 / 8.314) (1/333.75 – 1/280.75))

= 330.44 mmHg

 

 

 

답: 330.4 mmHg

 

 

 

 

[키워드] 벤젠의 증발열 기준문서