Chemistry What is the relationship between temperature and reaction rate?

Thread starter i_love_science
Start date Mar 3, 2021
Tags

Rate Reaction Reaction rate Temperature

AI Thread Summary

The relationship between temperature and reaction rate can be analyzed using the equation ln(K2/K1) = Ea/R(1/T1 - 1/T2), where K represents the rate constants at temperatures T1 and T2. The activation energy (Ea) is crucial for this calculation, but it is noted that it may not always be provided. A common rule of thumb indicates that increasing the temperature by 10 degrees Celsius can approximately double the reaction rate for many reactions. Understanding this relationship is essential for predicting how temperature changes affect reaction kinetics. Overall, the discussion emphasizes the importance of activation energy in calculating reaction rates at different temperatures.

Mar 3, 2021

i_love_science

Homework Statement: In general, if the temperature of a reaction is raised from 300 K to 320 K, the reaction rate will increase by a factor of approximately
A) 320 K/300 K
B) 22°C/2°C
C) 4
D) 2

Relevant Equations: Arrhenius equation

I think I should use ln(K2/K1)=Ea/R(1/T1 - 1/T2), and find K2/K1. I am given T1 and T2, but not Ea. I'm not sure how to continue.
Thanks.

(note: the answer is C)

Physics news on Phys.org

Mar 3, 2021

Borek

Mentor

That's only a rule of thumb, but for many reactions Ea is such that increasing temperature by 10 deg increases the rate about twice.

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...

View full post »