The reaction and rate law for the gas-phase reaction of carbon monoxide are: NO2
ID: 839301 • Letter: T
Question
The reaction and rate law for the gas-phase reaction of carbon monoxide are:
NO2 (g) + CO (g) ----------------------> CO2 (g) + NO (g) rate = k [NO2]^2
Which of the following three mechanisms could be valid for this reaction? For each mechanism indicate the rate law it predicts and whether or not it is a possible mechanism:
I. NO2 (g) + CO (g) -------------------> CO2 + NO (g)
2. NO2 (g) + NO2 (g) ---------------------> NO3 (g) + NO (g) fast
NO3 (g) + CO (g) ------------------------> NO2 (g) + CO2 (g) slow
3. NO2 (g) + NO2 (g) ---------------------------> NO3 (g) + NO (g) slow
NO3 (g) + CO (g) --------------------------> NO2 (g) + CO2 (g) fast
Explanation / Answer
The reaction and rate law for the gas-phase reaction of carbon monoxide are:
NO2 (g) + CO (g) ----------------------> CO2 (g) + NO (g) rate = k [NO2]^2
I. NO2 (g) + CO (g) -------------------> CO2 + NO (g)
RATE LAW PREDICTED :
rate=k [NO2] [CO]
2. NO2 (g) + NO2 (g) ---------------------> NO3 (g) + NO (g) fast
NO3 (g) + CO (g) ------------------------> NO2 (g) + CO2 (g) slow
RATE LAW PREDICTED :
rate=k [NO3] [CO]
3. NO2 (g) + NO2 (g) ---------------------------> NO3 (g) + NO (g) slow
NO3 (g) + CO (g) --------------------------> NO2 (g) + CO2 (g) fast
RATE LAW PREDICTED :
rate=k [NO2]^2
THUS
THE THIRD MECHANISM (C) IS VALID FOR THE GIVEN RATE LAW .
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.