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11 Dec 2019

Ethyl acetate has a vapor pressure of 0.1557 atm at 29.5oC and a normal boiling point of 77.0oC. Estimate the vapor pressure at 45oC using: a) Antoine equation and constants in Table B.4; 
 b) the Clausius-Clapeyron equation and the two data points provided; 
 c) linear interpolation between the two data points provided. 
 d) What explains the differences in the results? 
 e) Assuming the result from part a) is correct, what is the percentage error in the other two results? 


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Ethyl acetate has a vapor pressure of 118.3 mmHg at 29.5 degreesC and a normal boiling point of 77.0 degrees C. Estimate the vaporpressure at 45 degrees C using the Clausius-Clapeyron equation andthe two given data points.

The enthalpy of vaporization of a certain liquid is found to be 14.4 kJ mol−1 at 180 K, its normal boiling point (i.e. where boiling occurs at 1 atm). The molar volumes of the liquid and the vapor at the boiling point are 115 cm3 mol−1 and 14.5 dm3 mol−1 , respectively. (a) Estimate dp/dT from the Clapeyron equation and (b) the percentage error in its value if the Clausius-Clapeyron equation is used instead.

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