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Asked Mar 19, 2019

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Step 1

Part (a)

The reversible reaction for the formation of ammonia from nitrogen and hydrogen is:

N_{2} + 3H_{2} ↔ 2NH_{3}

From the stoichiometry of the above reaction, 1 mol of N_{2} reacts with 3 mol of H_{2}. For 85 mol of N_{2}/min, 255 mol H_{2}/min is required. But, only 230 mol H_{2}/min is given so, hydrogen (H_{2}) is the limiting reactants and 15% of H_{2} is reacted to produce ammonia.

The flowchart of the given process is drawn below.

Step 2

The formula used to calculate degree of freedom (DF) is written below.

There are total 3 unknown variables present. These are, *ṅ*_{1}*, **ṅ** _{2,}* and

There are 3 independent equations, 2 equation for material balance and 1 equation for conversion condition.

Therefore, degree of freedom for the given process is 0.

Step 3

Part (b)

Take atomic species for the material balance and calculate the composition of the product stream.

Apply material balance for nitrogen (N) and label the equation as (1).

Apply material balan...

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