If the fugacity coefficient of the components of a binary mixture are = 0.784, and =0.638 and mole fraction of component 1 is 0.4, write down and expression for the fugacity coefficient inp, for the mixture.

Answer : The expression for the fugacity coefficient , for the mixture is, -0.3669.

Explanation : Given,

Fugacity coefficient of component 1 = 0.784

Fugacity coefficient of component 2 = 0.638

Mole fraction of component 1 = 0.4

First we have to calculate the mole fraction of component 2.

As we know that,

Now we have to calculate the expression for the fugacity coefficient .

Expression used :

where,

= fugacity coefficient

= fugacity coefficient of component 1

= fugacity coefficient of component 2

= mole fraction of of component 1

= mole fraction of of component 2

Now put all the give values in the above expression, we get:

Therefore, the expression for the fugacity coefficient , for the mixture is, -0.3669.

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