I don't know how to approach this question? I need help
1 Answer
Explanation:
The question is asking for the order of the reaction about each reactant given data from the table supplies the following correlations:
- Doubling
["SO"_2] while holding["H"_2] constant doubles"Rate" ; - Holding
["H"_2] constant while doubling["SO"_2] doubles"Rate" .
Where
Now back to the question: the key is to find an exponential relationship that properly satisfies all (or both, as in this question) arithmetic correlations the question has implied. For this particular case:
1^color(navy)(1) xx 1^color(navy)(1) = 1 2^color(navy)(1) xx 1^color(navy)(1) = 2 2^color(navy)(1) xx 2^color(navy)(1) = 4
The exponent
"Rate" = k["SO"_2]^color(navy)(1) ["H"_2]^color(navy)(1)
... where
As a side note, the cardinal number that corresponds to the exponent of a particular reactant identifies the order of that species in the reaction, for instance
- A reaction is of "zero" order about a reactant with exponent
0 omitted (or in other words included as part of the constantk ) in the rate law expression - A reaction is of "first" order about a reactant with exponent
1 , as in this case for both reactants - A reaction is of "second" order about a reactant with exponent
2
Reactions of orders higher than two are rare given the unlikelihood for three microscopic particles to collide simultaneously.