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The problem as follows Q1: Consider a mixture of CH4 and H2S at 444 K and 70 bar. Calculate the fugacity coefficient of methane in an equimolar mixture using each of the following: (a) the van der...

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The problem as follows
Q1: Consider a mixture of CH4 and H2S at 444 K and 70 bar. Calculate the fugacity
coefficient of methane in an equimolar mixture using each of the following:
(a) the van der Waals equation of state
(b) the Redlich–Kwong equation of state
(c) the Peng–Robinson equation of state
Answered Same Day Dec 25, 2021

Solution

Robert answered on Dec 25 2021
133 Votes
Solution:
Given mixture at
The critical properties of the given mixtures are tabulated below,
190.6 K 46.1 bar
373.4 K 89.70 ba
The fugacity co-efficient is expressed as below,




Part (B) Redlich – Kwong equation of state ( )
R-K parameters for pure species and mixtures are computed first hand as below,



( ) ( )
√
(


)








In similar fashion second component is computed,



( ) ( )
√
(


)








As the mole percent of mixture is not given and by assuming as equally distributed with
50:50 ratio hence we take ( ) and ( )

√



( ) ( )( )√ ( )
...
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