For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?
Correct answer: D. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
- A. -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
- B. -rA = (k . PA
- C. 2 - k1PP)/(1 + KAPA + KPPP)
- D. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
- E. -rA = (k . PA . PB)/(1 + KAPA)
Explanation
For the Rideal mechanism, one reactant is adsorbed while the other reacts directly from the gas phase, giving a rate proportional to PA PB. Adsorption of both A and the product inhibits the reaction, producing the denominator 1 + KAPA + KPPP.
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