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# Rate Determining Question watch

1. Is this a possible two step mechanism for this reaction : 2NO + 2H2-----> N2 + 2H20

(1), NO + NO + H2 -----> N2 + H20 + O (Radical)
(2), H2 + O( Radical) ---------> H20
This should add up to give the overall equation above the page right ? By the way NO is second order and H is first order
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Just quoting in Puddles the Monkey so she can move the thread if needed
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(Original post by Puddles the Monkey)
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3. (Original post by Casio fx-991ES)
Is this a possible two step mechanism for this reaction : 2NO + 2H2-----> N2 + 2H20

(1), NO + NO + H2 -----> N2 + H20 + O (Radical)
(2), H2 + O( Radical) ---------> H20
This should add up to give the overall equation above the page right ? By the way NO is second order and H is first order
Not likely because your first step requires collision of 3 species at once.

Did the question say a two step mechanism was required?
4. (Original post by Casio fx-991ES)
Is this a possible two step mechanism for this reaction : 2NO + 2H2-----> N2 + 2H20

(1), NO + NO + H2 -----> N2 + H20 + O (Radical)
(2), H2 + O( Radical) ---------> H20
This should add up to give the overall equation above the page right ? By the way NO is second order and H is first order
I don't think you can get a 2 step mechanism here.

1) NO + NO --> N2O2
2) N2O2 + H2 --> N2O + H2O
3) N2O + H2 --> N2 + H2O

Step 2 is rds

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