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Just to clarify, the graph for a first order ln[X] vs time and zero order [X] vs time reaction is a decreasing linear slope. For second order it is an increasing linear slope. Right? So when would they be the increasing and decreasing exponential graphs?
To my understanding and looking at the textbook first order reactions will have a negative (-) slope, second-order reactions will have a positive (+) slope, and zero order reactions will have a negative (-) slope. This is due to the value of k either being positive or negative which affect the slope of the graph. Hope this helps.
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