Temperature and rate constants


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Michelle Chernyak 1J
Posts: 33
Joined: Fri Sep 29, 2017 7:06 am

Temperature and rate constants

Postby Michelle Chernyak 1J » Mon Mar 12, 2018 9:22 pm

Can someone explain to me how raising the temperature will affect the rate constant?

Sean Monji 2B
Posts: 66
Joined: Fri Sep 29, 2017 7:06 am

Re: Temperature and rate constants

Postby Sean Monji 2B » Mon Mar 12, 2018 10:02 pm

ln k = -EA/(RT) + ln A is the equation for this relationship.
The two variables are directly related, so increasing temperature results in a larger k and vice versa. This makes sense as a higher k means the reaction occurs at a faster rate, and a higher temperature results in more collisions resulting in the reaction to occur more often, thus an increased k value.
The direct relationship might be easier to see in this form:
k = 1 / (e ^ (Ea / (RT)) ) + A
A greater t results in a smaller exponent value for e, thus increasing the value of 1 / e^(Ea/RT), which is directly related to k.
Hope that helps

mayapartha_1D
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: Temperature and rate constants

Postby mayapartha_1D » Tue Mar 13, 2018 7:30 pm

Raising the temperature will induce a larger k!


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