14.4 Collision Theory and the Arrhenius Equation | General Chemistry

Chad provides a comprehensive lesson on Collision Theory and the Arrhenius Equation. Collision Theory is first described showing the three requirements that must be met for a chemical reaction to occur, and showing conceptually why reactions go faster at higher temperatures. Next the Arrhenius equation is presented which shows the dependence of the rate constant (k) on the activation energy and the temperature. An Arrhenius plot is shown including how it can be used to calculate the activation energy of a reaction as well as the Arrhenius constant. Finally, the lesson is concluded with a sample calculation of how to use the Arrhenius equation to calculate the rate constant at one temperature having been provided the value at a second temperature.
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00:00 Lesson Introduction
00:50 Collision Theory
04:29 Introduction to the Arrhenius Equation
08:50 Arrhenius Plot
14:07 Calculations with the Arrhenius Equation
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[@weeeeeoow]

Could watch this man's lectures for hours!
Well explained, lesson enjoyed! Thank you!

[@ChadsPrep]

We have enough videos to keep you busy for that time - You're welcome and Thank You!

[@analuzramos110]

Thank you! I tried reading the textbook on this topic and did not understand at all, saw your video and read it again and now I understand what I’m reading. I appreciate all your videos.

[@ChadsPrep]

Glad you found the channel, Analuz!

[@samimuhammad1201]

❤

[@bongamajozi5788]

Thank you, Chad, God Bless.

[@ChadsPrep]

You're welcome and to you also!

[@kagamer21]

Thank you, Chad! I hope you have a nice day too man 🤙🏽

[@ChadsPrep]

Thanks, Nicholas!

[@glassw1ng]

Thank you so much! You have quite literally saved my life.

[@ChadsPrep]

You caught the life-preserver! - Happy Studying!

[@buffylloyd1860]

Thanks you so much for all of your fabulous teaching videos!!

[@ChadsPrep]

You are very welcome and Thank You!

[@zp_suki2836]

Thank you!! It’s so well explained

[@ChadsPrep]

You are welcome!

[@water6133]

thank you so much!! it is all become clear for me now

[@ChadsPrep]

Awesome! I'm glad it helped

[@deetheman8522]

Hi Chad. I'm wondering if you could help me with a problem I'm stuggling with. I'm trying to add ionic reactions into an ammonia oxidation mechanism I hope to use with a simulation platform (Chemkin). I'm trying to ascertain the parameters for the modified Arrhenius equation(K=AT^B exp⁡〖(E_a/RT)〗) from the rate coefficients of reactions I got off a database. The database only lists the rate coeff at a single temperature so how, if at all possible, do I get the A, B(temperature factor) and Ea? Do you know of any databases that actually list the Arrhenius equation parameters for reactions? Sorry if the question is inappropriate for this video's comments.

[@oryo1074]

your videos make me feel like i have hope in chemistry

[@ChadsPrep]

Glad they do!

[@GabethNapil]

😀

[@timothymilsom1392]

My textbook gave me one paragraph on this... Really appreciate the help!

[@ChadsPrep]

Glad you found the channel, Timothy!

[@ilaydaozkardesler]

Great explaination ❤️

[@ChadsPrep]

Thank you

[@RohitRaj-ve7ly]

Great explaination

[@ChadsPrep]

Thank you.

[@realcirno1750]

This is so dope. I'm a big chemistry fan. From ln k = ln A - Ea/RT you could repeat a reaction at different temperatures and plot ln k on the y axis, 1/T on the x axis then use the slope of a linear regression to estimate Ea (Ea = - R * slope), this assumes you can figure out k though which may or may not be difficult

[@realcirno1750]

OK, I happened to write this comment before i got to the part where you explain this exact thing 😅

[@ChadsPrep]

Haha... maybe I can read minds!

[@nyarummusa9254]

Good Job sir. Thank you

[@ChadsPrep]

You're welcome and Thank You.

[@JM-2K2K]

20:44 how come it’s t1-t2 instead of t2-t1 as the formula says?

[@AnirejuoritseOlowu-rv7cv]

Thank you so much🙏

[@ChadsPrep]

You're welcome.

[@islatinsley8]

Hi! i just want to clear this up. So, In determining the In k1/ Ink2 will just depend on what you choose, it will not be based on the formula or something? Please answer 🥺

[@jasjeetgill3130]

u are a lifesaver

[@ChadsPrep]

Excellent!

[@user-gp4yy1nq1f]

Really helpful

[@ChadsPrep]

Glad to hear it

[@johnmosheim]

one suggestion since units are supper important, when referring to moles specify mole = gmoles or kgmoles or other? otherwise for guys like me it leaves me guessing…thanks a ton. ps I’m a ChemE.

[@ChadsPrep]

While this may be helpful for you, it would likely confuse most of the general audience. In general chemistry, we don't even present the idea of kgmoles; it's always gmoles, and therefore in general chemistry, moles is simply synonymous with gmoles. Hope this helps!

[@TimothyFernando-yj9wr]

Or how did it change

[@TimothyFernando-yj9wr]

Why did the 25⁰C change

[@ChadsPrep]

Hey! Can you give me the time in the video for this question?

[@TimothyFernando-yj9wr]

@@ChadsPrep ohh thanks I got the answer