The rate of decomposition of acetaldehyde, CH_3CHO(g), into CH_4(g) and CO(g) in

Question

The rate of decomposition of acetaldehyde, CH_3CHO(g), into CH_4(g) and CO(g) in the presence of I_2(g) at 800 K follows the rate law rate of reaction = k[ CH_3 CHO] [I_2] The decomposition is believed to occur by the following two-step mechanism: step 1: CH_3 CHO(g) + I_2 (g) Rightarrow CH_3 I(g) + HI(g) + CO(g) step 2: CH_3 I(g) + HI(g) Rightarrow CH_4(g) + I_2(g) Which species is the catalyst for the overall reaction HI I_2 CO CH_3CHO CH_4 CH_3I Which step in the propose d mechanism is most likely the rate-limiting step

Explanation / Answer

1) IODINE IS AGAIN REGENERATED AFTER COMPLETION OF THE REACTION.HENCE IODINE ACTS AS A CATALYST

ANSWER IS I2

STEP-1 IS THE RATE LIMITING STEP

BECAUSE FROM THE RATE LAW IT IS FOUND THAT RATE OF THE REACTION DEPENDS UPON THE CH3CHO AND I2

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