Assignment%201_solution

# Assignment%201_solution - Assignment Solution 1 Chemical...

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Assignment Solution 1 Chemical Engineering 2800 (Summer 2008) Fundamentals of Process Engineering University of Utah Dr.Mataz Alcoutlabi Problem 1 Table G.1, p. 1057, provides constants for the Antoine equation. The Antoine equation models the vapor pressure of a pure substance as a function of temperature: T C B A p + - = * ln where A = 16.0137, B = 3096.52, C = -53.67 for toluene and the temperature range is 280 – 410 K. Using the NIST Chemistry WebBook ( http://webbook.nist.gov/chemistry/ ), look up the Antoine constants for toluene. Convert the NIST version to the same pressure units as your text and comment on the agreement between the two resulting sets of constants, A, B, and C. Solution Antoine Equation for toluene vapor pressure. From Table G.1 with T (=) K and p* (=) mm Hg T C B A p + - = * ln , 280 < T < 410 K where A = 16.0137, B = 3096.52, C = -53.67. From NIST with T (=) K and p (=) bar ( 29 T C B A p + - = 10 log , 309 < T < 385 K where A = 4.07827, B = 1343.943, C = -53.773. Start with NIST change from log 10 to log e = ln ( 29 T C B A p p + - = = 10 ln ln log 10 change pressure units * 760 01325 . 1 * p Hg mm bar ap p = = a T C B A p T C B A ap ln 10 ln * ln 10 ln * ln - + - = + - =

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Put the NIST values in for A,B,C. T
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Assignment%201_solution - Assignment Solution 1 Chemical...

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