Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 4: Stoichiometry

Additional Homework Problems

CDP4-KB

The following elementary gas phase reaction takes place in a constant-pressure isothermal vessel (1 atm, 25):

CH4(g) + 2Cl2(g) CH2Cl2(g,l) + 2HCl(g)

Taking chlorine as your basis of calculation:

(a) Set up the stoichiometric table, assuming that the feed is in stoichiometric proportions and comprised only of reactants.

(b) Evaluate .

(c) Evaluate -rAin terms of X, the conversion of chlorine, the specific reaction rate, and the initial concentration of chlorine.

(d)What is the concentration of chlorine at 60% conversion."

(e)What is the rate of reaction when X = 0.6?

(f) If the frequency factor is 2*1012 liters2/s*g-mol2, calculate the activation energy.

(g)What is the specific reaction rate at 100 ? (Note: One of the products is a liquid with a vapor pressure of 400 mmHg = 53 kPa at 25 )


Additional Data:

k = 0.2dm6/s*g-mol2 at 25 (estimate)

R = 1.987 cal/g-mol*K = 0.082 dm3*atm/g-mol*K