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Units

Posted: Fri Mar 01, 2019 8:44 pm
by Parth Mungra
What are the units for rate? Also, what are the units for the n or m values in the differential rate law?

Re: Units

Posted: Fri Mar 01, 2019 10:08 pm
by Patrick Cai 1L
The units of the rate law vary with the order of the reaction, with the units of the general differential rate law given as moles/second ([change in concentration]/[change in time]).

Re: Units

Posted: Sat Mar 02, 2019 6:02 pm
by Albert Duong 4C
Rate is typically in mol*L^-1*s*-1 or M/s where M is molarity.

Re: Units

Posted: Tue Mar 05, 2019 11:39 pm
by Vanadium Wang 4H
The rate of a reaction is measured in terms of how fast the concentration of one of the reactants is falling. Its units are mol*L-1*s-1

The exponents m and n are called partial orders of the reaction which depend on the reaction mechanism and can be determined experimentally.

Re: Units

Posted: Wed Mar 06, 2019 11:14 am
by megan blatt 2B
Like the previous comment said, the rate is in mol*L^-1*s^-1 or M*s-1. The units of the rate constant changes with the order of the overall reaction to ensure that the rate always ends up with the units previously mentioned.

Re: Units

Posted: Wed Mar 06, 2019 7:20 pm
by Nina Do 4L
As everyone stated above, it will be M/L per second and as you increase to each order, you're constantly dividing by 1/M so for zero order, the units will be Moles per second. s^-1
1st order will be per second or s^-1M^-1
and so forth

Re: Units

Posted: Wed Mar 06, 2019 7:37 pm
by Nada AbouHaiba 1I
the m and n powers do not have units, they are just experimentally determined values