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Slopes of a plot

Posted: Sun Mar 17, 2019 4:04 pm
by JulieAljamal1E
Is the slope of a plot of a first order negative?

Re: Slopes of a plot

Posted: Sun Mar 17, 2019 4:25 pm
by Meghanhe1l
yes it is

Re: Slopes of a plot

Posted: Sun Mar 17, 2019 4:45 pm
by Gillian Ward 1F
Since first order is ln[A]=-kt+ln[A]o it has a negative slope due to the -k.

Re: Slopes of a plot

Posted: Sun Mar 17, 2019 10:51 pm
by SydBenedict2H
The only one that isn't -k is is 2nd-order, which is just k (+k).

Re: Slopes of a plot

Posted: Sun Mar 17, 2019 10:54 pm
by Giselle1B
Zero Order also has a negative slope. Think of the equations as mx+b. The Slope (mx) is similar to kt in the order process formulas.

Re: Slopes of a plot

Posted: Sun Mar 17, 2019 10:58 pm
by Douglas Nguyen 2J
Yes, both zero and first order reactions' linear plots have slope as -k.

Re: Slopes of a plot

Posted: Fri Feb 28, 2020 8:05 pm
by Kate Swertfager
Yes the graph of the first order has a negative slope. The slope is -k and since k is always positive the slope is always negative for 1st order.

Re: Slopes of a plot

Posted: Fri Feb 28, 2020 11:20 pm
by Radha Patel 4I
Zeroth Order plot is negative (-k). First order plot is negative (-k). Second order plot is positive (+k). Also Lavelle hasn't discussed it yet I believe, but the units of the rate constant k in Zeroth Order is M/s, in First Order is 1/s, and Second Order is M^-1* s^-1