Units

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Parth Mungra
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

Units

Postby Parth Mungra » Fri Mar 01, 2019 8:44 pm

What are the units for rate? Also, what are the units for the n or m values in the differential rate law?

Patrick Cai 1L
Posts: 93
Joined: Fri Sep 28, 2018 12:25 am

Re: Units

Postby Patrick Cai 1L » Fri Mar 01, 2019 10:08 pm

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]).

Albert Duong 4C
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Re: Units

Postby Albert Duong 4C » Sat Mar 02, 2019 6:02 pm

Rate is typically in mol*L^-1*s*-1 or M/s where M is molarity.

Vanadium Wang 4H
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Units

Postby Vanadium Wang 4H » Tue Mar 05, 2019 11:39 pm

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.

megan blatt 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

Re: Units

Postby megan blatt 2B » Wed Mar 06, 2019 11:14 am

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.

Nina Do 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

Re: Units

Postby Nina Do 4L » Wed Mar 06, 2019 7:20 pm

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

Nada AbouHaiba 1I
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Re: Units

Postby Nada AbouHaiba 1I » Wed Mar 06, 2019 7:37 pm

the m and n powers do not have units, they are just experimentally determined values


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