Vander Waa Ls

ChE 412: Ch emical Engi ne nee er in g Thermodynami Thermodynami cs 1  August ____, 2013

Volumetric Properties of Pure Fluids 1. For methyl chloride at 100C the virial coefficients are: B = -242.5 cm3 mol-1

C = 25, 200 cm6 mol-2

Calculate the work of mechanically reversible, isothermal compression of 1 mol of methyl chloride from 1 bar to 55 bars at 100C. Base calculations on the following forms of the virial equations:

(a)    



 



(b)         

 

Where:  

 



and  

   ( )

ChE 412: Ch emical Engi neer in g Thermodynami cs 1  August ____, 2013

2. Calculate Z and V for ethylene at 25 C and 12 bar by the following equations. a. Equation 3.40 with the following experimental values of the virial coefficients: B= - 140 cm3/mol and C = 7200 cm 6/mol2 b. Redlich/Kwong equation c. The Soave/Redlick/Kwong equation d. The Peng/Robinson equation

ChE 412: Ch emical Engi neer in g Thermodynami cs 1  August ____, 2013

ChE 412: Ch emical Engi neer in g Thermodynami cs 1  August ____, 2013

3. Calculate Z and V for ethane at 50 C and 15 bars by the following equations: a. Truncated virial equation 3.40 with B = -156.7 cm 3/mol and C = 9650 cm 6/mol2 b. Redlich/Kwong equation c. The Soave/Redlick/Kwong equation d. The Peng/Robinson equation

ChE 412: Ch emical Engi neer in g Thermodynami cs 1  August ____, 2013

ChE 412: Ch emical Engi neer in g Thermodynami cs 1  August ____, 2013

4. Calculate Z and V for sulfur hexafluoride at 75 C and 15 bars by the following equations a. Truncated virial equation, 3.39 with B = -194 cm 3/mol and C = 15,300 cm 6/mol2 b. Redlich/Kwong equation c. The Soave/Redlick/Kwong equation d. The Peng/Robinson equation For sulfur hexafluoride, T c = 318.7 K, Pc =37.6 bar, Vc = 198 cm3/mol and



= 0.286