Respuesta :
Vapour pressure is the pressure exerted by the vapor in its condensed phase. The vapor pressure of ethanol at 13. 6°C is 38.61 torr.
What is Clausius-Clapeyron equation?
Clausius-Clapeyron equation is the equation that estimates the vapor pressure at a given temperature when the enthalpy of vaporization is known.
Given,
Initial temperature = 286.75 Kelvin
Final temperature = 351.65 Kelvin
Final pressure = 760 torr
Using the Clausius-Clapeyron equation the vapor pressure is calculated as:
ln(P2 ÷ P1) = ΔHvap ÷ R (1 ÷ T1 – 1 ÷ T2)
ln 760 ÷ P = (38600 ÷ 8.314 ) (1 ÷ 286.75 - 1 ÷ 351.65)
ln 760 ÷ P = 2.98
760 ÷ P = e²°⁹⁸
760 ÷ P = 19.68
P = 760 ÷ 19.68
= 38.61
Therefore, 38.61 torr is the vapor pressure.
Learn more about vapor pressure here:
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