The antoine equation is a class of semiempirical correlations describing the relation between vapor pressure and temperature for pure substances. The national institute of standards and technology nist uses its best efforts to deliver a high quality copy of the database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. A total productivity system to achieve more by doing less. Automatic computation of antoine equation 31 constants. Wagner liquidvapour pressure equation constants from a. Download for offline reading, highlight, bookmark or take notes while you read o principezinho. V apour pressure for l iquid vapour equilibrium antoines equation fitting t in kelvin and p in kpa substance formula a b c acetylene c 2h 2 14. P vapour pressure of the component, mmhg t a, b,c component specific constants these antoine coefficients should only be used within the temperature range quoted please note that we do not take any liability. View 50378161constantesantoine from lanbio 39 at unicamp. Vapor pressure calculation by antoine equation water.
The constants for 274 pure substances were determined by minimization in the sum of the squares of. The antoine equation is a class of semiempirical correlations describing the relation between. A methodology to determine the a, b, c, and d constants from the wagner equation is presented. Antoine coefficients for almost 700 components the form of the antoine equation used in this spreadsheet is presented below. Nist reserves the right to charge for access to this database in the future. Turning to the free energy, with the elimination of excess entropy and excess volume at constant pressure, we have, gu xvxvee.
Piperidina 335 340 345 350 355 360 365 25 30 35 40 45 50 55 60 t k t t c t c b t t c a t t c p eb ln t c b p a eb ln t b t ac a t p p c ln ln t p c t b t ac p a ln ln t p c t p a ac b. The equation was presented in 1888 by the french engineer louis charles antoine 18251897. A range free method to determine antoine vaporpressure heat transferrelated equation coefficients using the boubaker polynomial expansion scheme. The extended equation forms can be reduced to the original form by setting the additional parameters d, e and f to 0. Antoine constants chemical substances chemical compounds. Russian journal of physical chemistry a 2011, 85 5, 900902. The antoine equation is a vapor pressure equation and describes the relation between vapor pressure and temperature for pure components. Rapatriement sanitaire des lesions du nevraxe free. In this video, we look at how the antoine equation can be used to relate the temperature and vapor pressure of a given substance. Maximumlikelihood evaluation of antoine equation constants for vapor pressures of morpholine, nheptane, cyclohexane and methylcyclohexane.
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