Chemical Engineering - Chemical Reaction Engineering - Discussion


The fractional volume change of the system for the isothermal gas phase reaction, A 3B , between no conversion and complete conversion is

[A]. 0.5
[B]. 1
[C]. 2
[D]. 3

Answer: Option C


No answer description available for this question.

K.Srijanya said: (Aug 16, 2013)  
The answer is 2, A---->3B HERE A REACTANT(input) B PRODUCT(output) SO WE HAVE A FORMULA (output-input)/input

By this we can get like (3-1)/1 = 2.

Surendra.D said: (Sep 14, 2013)  
The answer is 2: Because one mole of A gives 3 moles of B. And here don't give any conversion fractions. So we are simply use the formula product moles-reactant moles. After divide with reactant moles.

Sudip Chowra said: (Sep 27, 2014)  
Use volume expansion factor.

[(volm at 100% conversion-volm at 0% conversion)/volm at 100% conversion]

Jaydeep Jani said: (Sep 28, 2014)  
V = V0(1+(volm at 100% conversion-volm at 0% conversion)/volm at 100% conversion)Xa).

Put Xa=1.
V = 3V0.

So fractional value changes from 1 to 3.

Gani said: (Dec 14, 2014)  
This is a gas phase reaction density is not constant.
So e = [Total no of moles of products-Total no of moles of reactants]\Total no of moles of reactants.

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