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# URGENT! Help to draw the Arrhenius plot please?? watch

1. Hi,

I'm having a lot of problems trying to draw my Arrhenius graph to determine the activation enthalpy at each different temperature (293,303,313,323,333K).
Apparently, you are meant to plot a graph of lnk over 1/Temperature but I have absolutely no idea what K is for each different temperatures and can't find anywhere telling me.

The Initial rate for each of my temperature are
293 - 0.206
303 - 0.3
313 - 0.675
323 - 0.988
333 - 1.625

The rate equation of the reaction is rate= k[H2O2(aq)[MnO(s)]
2. (Original post by Marseille013)
Hi,

I'm having a lot of problems trying to draw my Arrhenius graph to determine the activation enthalpy at each different temperature (293,303,313,323,333K).
Apparently, you are meant to plot a graph of lnk over 1/Temperature but I have absolutely no idea what K is for each different temperatures and can't find anywhere telling me.

The Initial rate for each of my temperature are
293 - 0.206
303 - 0.3
313 - 0.675
323 - 0.988
333 - 1.625

The rate equation of the reaction is rate= k[H2O2(aq)[MnO(s)]
The rate equation is incorrect as you cannot have a solid appearing.

First of all find out the correct rate equation by investigating the effect of changing the concentration of the hydrogen peroxide on the rate.

Then you must use the rate equation and substitute the concentration of the hydrogen peroxide used to find the rate constant.

This must be carried out at each temperature.

Then you can plot lnk against 1/T

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