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-   -   Shouldn't K be different? (http://chemistryhelpforum.com/showthread.php?t=146425)

abhistud Sep 10th 2017 08:46 PM

Shouldn't K be different?
 
This is the question:

http://file.etoosindia.com/vol/20170...dd9c7017cb.png

This is how he did it:
http://file.etoosindia.com/vol/20170...dd9c7017cb.png
Then, he said that if K is equal in both the cases, then, it is first order. But, shouldn't K vary with time in first order reaction?

chemtopper Sep 23rd 2017 06:11 AM

What is k?
It is the rate constant and it can be changed only changing the temperature for a given reaction.
If reaction is carried out at the same temperature then value of k is constant.


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