424 311 Chemical Reaction Engineering I
Homework Solution
Part I before Midterm Examination
since June 19th
– July 12th
, 2012
Other Problem
A zero-order homogeneous gas reaction with stoichiometry A→R
proceeds in a constant-volume bomb, Pt = 1 atm when t = 0 and Pt =
1.5 atm when t = 1hr. If the same reaction, same feed composition,
and initial pressure proceeds in a constant-pressure setup, find V at t =
1 hr if V0 = 1 at t = 0.
The first-order homogeneous gaseous decomposition A→2.5R is
carried out in an isothermal batch reactor at 2 atm with 20% inerts
present, and the volume increase by 60% in 20 minute. In a constant-
volume reactor, find the time required for the pressure to reach 8 atm
if the initial pressure is 5 atm, 2 atm of which consist of inerts.
The gas reaction 2A→R+2S is approximately second order with
respect to A. When pure A is introduced at 1 atm into a constant-
volume batch reactor, the pressure rises 40% in 3 minute. For a
constant-pressure batch reactor find (a) the time required for the same
conversion, and (b) the fractional increase in volume at that time.
A zero-order homogeneous gas reaction A→rR proceeds in a
constant-volume bomb, 20% inerts, and the pressure rises from 1 to
1.3 atm in 2 minute. If the same reaction take place in a pressure-
constant batch reactor, what is the fractional volume change in 4
minute if feed is 3 atm and consists of 40% inerts.