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Reaction beween NO (2) and F (2) to give...

Reaction beween `NO _(2) and F _(2)` to give `NO _(2) F` takes place by the following machanism:
`NO _(2) (g) + F _(2) (g) overset( "slow") to NO _(2) F (g) + F (g) , NO _(2) (g) + F _(2) (g) overset("Fast") to NO _(2) F (g)`
Wiite the rate expression and order of the rection.

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`NO_2(g) + F_2(g) overset("Slow")(rarr) NO_2F(g) + F(g)`
`NO_2(g)+F(g) overset("Fast")(rarr)NO_2F(g)`
In a multistep reaction, the slowest step is the rate determiņing step.
Therefore rate of the complete reaction will depend upon first step i.e.,
`NO_2(g) + F_2(g) overset("Slow")(rarr) NO_2F(g) + F(g)`
`therefore` rate=`k[NO_2][F_2]`
Order=1+1=2
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