In each case, you will need to explain the reason you chose the answer you did.

a. An irreversible, liquid-phase, second-order reaction, A → Product(s), proceeds to 50% conversion in a PFR operating isothermally, isobarically, and at steady state. What conversion would be obtained if the PFR operated at half the original pressure (with all else unchanged)?
(1) >50% (2) <50% (3) 50% (4) Insufficient information to answer definitively

b. An irreversible, gas-phase, second-order reaction, A → Product(s), proceeds to 50% conversion in a PFR operating isothermally, isobarically, and at steady state. What conversion would be obtained if the PFR operated at half the original pressure (with all else unchanged)?
(1) >50% (2) <50% (3) 50% (4) insufficient information to answer definitively

c. The rate constant for an irreversible, heterogeneously catalyzed, gas-phase, second-order reaction, A → Product(s), was determined to be 0.234 from experimental data in a packed-bed reactor. The person analyzing the experimental data failed to include the large pressure drop in the reactor in his analysis. If the pressure drop were properly accounted for, the rate constant would be (1) >0.234 (2) <0.234 (3) 0.234 (4) insufficient information to answer definitively.