Does the rate of a zero order reaction depend on temperature????
If not... WHY????
any one plzz reply...
106It does depend on temperature.
Rate of ANY reaction depends on temperature
11Hmm, Yeah it does depends on temperature.
Dont you remember the integrated zero order rate law?
It is:-
[A]t = -kt + [A]0, where,
where [A]t represents the concentration of the chemical of interest at a particular time, and [A]0 represents the initial concentration.
Rate of this reaction is independent of the concentration of the reactant.
1Yeah.. I 2 knew the same..
but the in recent FIITJEE Part Test they said dat rate of 0 Order reaction and nuclear decay are INDEPENDENT OF TEMPERATURE...
Later one is okay..coz nuclear phenomena are independent of physical conditions..
BUT WHAT ABOUT THE FIRST?? O ORDER REACTION??
1@bhaarat dint they explain the reason??
your post has left me in doubts!!!
In general toh a layman will say that a reaction is tempr dependent.... plzz explain about Zero order reactions in this context..
1@ Euclid-- No.. They Didnt give any Explanation....
The reaction rate is Obviously independent of concentration but how can that be the cause??? for it being temperature independent????
Any one plzz plzz get this cleared!!!
23btw i checked my notes and read that arrhenius equation is not valid for zero order reactions
1why don't we consider this.
if the temperature is increased the average k.e. of the molecules will increase so the no, of collisions will increase.as a result per unit time the no. of effective collisions will increase so amount of products will increase/unit time,hence the rate will increase.
although radioactivity is 1st order but the reaction mechanism cannot be explained by the concept of product formation by RANDOM molecular collisions.
36Can we take it like this...!!
Suppose, A → P with rate constant k following the zero order kinetics...
then, r = k [A]° = k
Now, integrated rate law for zero order reaction is,
At = A0 - kt
Now, as t changes the concentration changes...
but rate of zero order reaction dosen't depend on [A] but entirely depends on k....
so, rate for zero order reactions dosen't depend on temperature...
not at all sure for this
1But the rate constant "k" itself is a function of temperature, so i think 0 order reactions are temp dependant