rate

[deleted801953]

What's the difference between the two rate eq? Would they give us the same value?

i don't know when the first rate equation is used?

i know that the second one is the rate law, determined experimentally


aA--->bB+cC

1-rate= -delta[A]/a*delta t = +delta/b*deltat etc


2-rate= k [A]^x

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[Doogie.Howser]

1- This is the rate of the appearance/disappearance of a specific species you're studying. One can study the rate of appearance of a product, or the disappearance of a reactant through equation number one.

2- Like you said, this is the rate law. This explains the rate of the overall reaction and must be determined experimentally. This takes all reactants into account to determine the rate of the overall reaction.

 

[deleted801953]

thank you so much!

 

[aldol16]

They have to give you the same value because they're both measures of rate. But the problem is, with the first equation alone, you have many variables, i.e. the concentrations of each reagent and delta t. You can't solve that equation - it's just a useful expression.