PS7_ChE230_assign_10-1

PS7_ChE230_assign_10-1 - 1 3 2 3 2 2 3 2 5 1 2 − − + =...

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ChE 230 Spring 2010 Problem Set 7 03/16/10 – 03/23/10 1. The vapor pressure (P*)of ethylene glycol at several temperatures is given below: T ( o C) 79.7 105.8 120.0 141.8 178.5 197.3 P* (mm Hg) 5.0 20.0 40.0 100.0 400.0 760.0 Using Mathcad, Polymath and hand calculations, perform a linear regression analysis to fit this data to the Clausius-Clapeyron equation. Give the best fit equation and give the coefficient of determination. For the hand calculations, develop the table as shown in class and show all intermediate averages. From these results, calculate the heat of vaporization. 2. Linearize the following equations, indicate what you would plot as the vertical and horizontal axes, and give the expression for or value of the slope and intercept.
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Unformatted text preview: 1 3 2 3 2 2 3 2 5 1 2 − − + = − = = − = + + = ] ax [ y ) e ) x ( a ) y sin( ) d re y ) c n mx y ) b b ) x ( a y ) a b b x / b 3. The mass transfer coefficient ( k ) for dissolution of a solid in a laboratory rotating disk apparatus operating at r (revolutions per minute) obeys the following relationship: s . k ) r ( a k 1 1 1 1 5 + = Data for k and r are given below. Using hand calculations perform a linear regression to determine the values of a and k s . These two parameters must be reported with the correct units and with the correct number of significant figures. All intermediate summations must be shown. r (min-1 ) k (10-3 cm/s) 25 4.69 50 4.78 75 4.82 100 4.84 200 4.89...
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This note was uploaded on 05/14/2010 for the course CHE 230 taught by Professor Stinespring during the Spring '10 term at WVU.

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