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categoryهندسة كيميائية schoolبكالوريوس event_available2026-07-16

السؤال

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1. Experimental data for the gas-phase heterogeneous catalytic reaction A + B ===> C are shown below. The limiting step in the reaction is known to be irreversible, so that the overall reaction is irreversible. The reaction was carried out in a differential reactor to which A, B, and C were all fed. Reaction Rate Run Number PA (atm) PB(atm) PC(atm) mol/(g-cat*sec) 1 1 2 1 10 3 10 4 1 20 5 1 20 12122 222 2 0.1140 2 1.1400 2 0.1800 2 2.2730 10 0.9260 6 20 1 2 0.1860 7 0.1 1 2 0.0243 a.) Suggest a power rate law (i.e., of the form rate = k C В K.CA CB CC), that is consistent with the experimental data. Hint: Plot -гA as a function of PA, as a function of PB, and as a function of PC. b.) From your rate law equation, which species can you conclude are adsorbed on the surface? Explain your reasoning. c.) Suggest a mechanism and rate-limiting step and derive its rate expression. Use the non-linear regression feature of Polymath to estimate the constants in your rate expression and demonstrate that it is consistent with the data.

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