Find the Vapour Pressure (Clausius-Clapeyron Equation)

Given the enthalpy of vaporization, and the vapour pressure at one temperature, you can predict the vapour pressure at a second temperature. Use the Clausius-Clapeyron.

[@kristennoyes2188]

Even 10 years later, you're still saving chemistry grades left and right. This is God's work. Keep it up man, thank you so much.

[@chemistNATE]

LOVE IT. Ask me anything you want, any time. This invitation is for EVERYONE.

[@theesanshaik393]

12 YEARS LATERRRR :)))) Thanks alottt

[@thenotoriussartorius2405]

I never thought I would smile or laugh while studying for a Chemistry final. Thanks, needed that.

[@The5partacu5]

I've learned more from you than my Gen Chem professors, I swear. Keep on doing God's work man.

[@ananyakatiyar3275]

woah this video is literally 11 years old and still a great help! thank you

[@Palomino0813]

Thank you for being thorough! My textbook and every other website I looked at for the Clausius-Clapeyron equation assumed I knew how to undo ln and didn't go over it, and I was getting pretty frustrated. You made this equation easy for me to understand and made me laugh in the process. You've earned a new subscriber!

[@UneasyTortoise]

i feel insulted yet educated after this :D

[@greenlizardballs]

"the kelvins cancel out, just trust me on that" lmao i am going to subscribe and pass the shit out of gen chem 2 bro, keep em coming

[@Bilbus7]

So did you end up passing the shit out of gen chem 2 bro?

[@magicagrnub620]

@@Bilbus7Do you think he did? I'm still wondering

[@Bilbus7]

@@magicagrnub620 LOL Yeah he probably crushed it

[@lemonz1769]

My professor glazed over this and never solved an equation and my book doesn't even discuss this. For the life of me I couldn't remember how to undo the ln(x) and every other online resource just says to undo it without explaining how. Thank you, thank you, thank you!!!!!

[@Whats_noah_up_to]

Lmao at 3:11 "the kelvin...... Whatever (cancels it)"

[@jessicahenry3352]

this video is so helpful when u have professors that are so not helpful. thank you for making this.

[@ComradeDispenser]

I always love when some random youtube video I found by googling a subject teaches me more about chemistry in five minutes than my professor does in fifty.

[@maya-dp9td]

I have my college final tomorrow and you just saved me, thank you so much for actually teaching how to solve it.

[@abduluddin5645]

haha ur pretty funny, first with the trust me on the kelvin cancelation then the suck it up on ln part, i laufed

[@mharth6594]

+Abdul Uddin I've been told to suck it up in football but I've never been told to suck it up in academics. Love it. I'm still laughing!!

[@ViceroyNikolai]

This is the most well-explained video on this topic I have found, outstanding, well done and thanks!

[@ramos8468]

3:11 " I got kelvins, ugh, whatever.. just trust me on that " LMAO me too. I still learned more from you than my other professors.

[@dnehl]

Your videos always put a smile on my face!

[@jhmasoud]

Other than the fact that you saying lawn drives me freaking nuts I appreciate this incredibly helpful video.

[@karinachavez9926]

You made this so easy for me to understand now! THANK YOU, I WISH I HAD DISCOVERED THIS EARLIER IN THE SEMESTER

[@HellboyMPG]

Your an absolute legend of a chemistry tutor!

[@lovelyperson9]

Hahaha "I got Kelvin...on the bottom of my...whatever. The Kelvins cancel out, just trust me on that." XD He was on the right track! So funny, thank you for making this video entertaining.

[@albionhustler9836]

Thank you for the explanation of Ln at the end. This is what was stumping me!!!

[@xxthemcrkidxx]

You my good sir are both a scholar and a gentleman.

[@TheVenusRising]

THANK YOU!! I saw other videos but you are the only one who explained how to do away with the "ln". Other people were going right to the answer....so frustrating. Thank you thank you thank you.

[@pobrien130]

Thank you so much you're such a huge help with all of my chem!!!

[@ItsssQuade]

THANKS SO MUCH FOR THIS! I have a chem test tomorrow and I was struggling trying to figure out how to undo the ln. Thanks so much for your help! You're a godsend

[@user-pf1tf1bh2x]

Sir , you've saved my whole life , I had A serious problem with The Ln thing and forget about e 😅 .. thanks a lot

[@ayowhogotyousmilin8691]

damn this video helped me at 1:30 am on a random school night even after 10 years

[@natestewart8059]

Thanks, +ChemistNate! This made much more sense than the LiveScribe I was given by my instructor. I couldn't figure out how to address the ln portion to make it go away. And the T2-T1 parts on my calculator didn't work until I saw how you did it. Thanks for the helpful videos!

[@joshrevels9713]

Thank you, Nate! This was helpful. Hope to see more videos of physical chemistry content by you. It'll help me through this semester if so.

[@kevluv93]

Dude, THANK YOU!!!! This was so helpful you have no idea!

[@asisababun7543]

Best Video on CC equation by steps

[@xXInfernalWerewolfXx]

Loved the vid. great explanation, thanks!!!

[@ChlorophylliaKZ]

Awesome explanation. Answered all my questions as I was working through this equation. and made me laugh! Looks like you posted this a while ago, but hey, thanks very much :)

[@joudivilar]

You are amazing, your video was a great help, thank you for uploading it!!!

[@fleurnoir98]

Thank you soooO much. This video has helped me ALOT!!!!!

[@hisamazingg]

Thank you!! This really helped me understand my gen chem 2 homework!

[@dariomaidana9858]

From Argentina, Thank you!!

[@jayjason556]

wow...90 mins with my professor= 7 mins of you

[@jlee1131]

Thanks for the video, helped me understand it better :)

[@viper8815]

Thanks for doing this clearly!!

[@TheWiteshark]

the lawn, undo the lawn and suck it up

[@runaraytrain8801]

I feel so educated, as well as attacked! 😂👍🏾

[@eatjinarmy3469]

You just saved my life dude!

[@morenokevin94]

Thanks man well explained!!

[@jennylopez1495]

This was very helpful!

[@VideoSouls]

you just saved me. thanks!

[@mattjelani]

Thank you man! You rock!

[@chikoflake]

You are a life saver bro! There is no way I can thank you enough dude, I've always disliked chemistry because I've had very iffy teachers that just made it very confusing, but you explained it in a way that gets to the point without the confusion idk. either way you rock lol is that offer about test topics still valid?!?!?!?!

[@xxLincixx]

Lol I love your method of teaching.

[@chemistNATE]

Those are BASICALLY the same equation, because vapour pressure IS a type of equilibrium. This equation is just a simplified version, for one specific process.

[@melvinvasquez8518]

Kelvins cancel out because everything in that parenthesis is one quantity; i.e. at end of the day it's one K not two.

[@saurabh9978]

nice... easy and simple..!! thanks very much

[@Scarecrow545]

For anyone wondering, the Kelvins cancel out because the one on the left was in the denominator of the denominator, which basically means it would go back up to the numerator.

[@Juani2392]

gracias desde Argentina, me sirvio para pasar el examen. Thanks, from argentina, it help me for pass the exam of chemestry

[@jeepgurl1379]

Okay, it works. I love it!

[@ryan80166]

Thanks man you made this EASYYYYYYYYYY!

[@joshrevels9713]

Bookmarked the site. I couldn't find a submission tab on the site. Nate, Here is a list of items for my next test. Solve Henry's Law problems, Solve Raout's Law problems, Calculate freezing point depression and/or boiling point elevation. Calculate the osmotic pressure, use osmotic pressure data to calculate molecular weight. Keep up the great work! I loved the video for Eutrophication. Hopefully you continue so that I can use you as a resource for my students.

[@musikmachine4]

very helpful, thank you!

[@YesNoMaybeSometimes]

6:13 to 6:20 best part of the video haha love ya man

[@phil1pd]

Thank you!!

[@mohamednabil3353]

your way of explaining is really funny but it works (Y)

[@Arca02011]

lol youre very entertaining, gonna sub

[@sandradlugo]

thank you, god bless you :)

[@javiendsnow]

chemistNATE.... YOU ARE a live saver buddy!

[@JanetLedesma26]

Muchas gracias!me ayudo muchisimo

[@CODTALES-KILLSTREAKS]

This equation can also be used to calculate the vapour pressure of a substance inside of a vacuum. I did this also to predict the air density at altitude. Which turned out to be very close, obviously with the make up of the atmosphere it was a challenge but it’s pretty close.

[@melvinfaust]

thank mr nate

[@RougeSamurai77]

Thanks a lot!

[@fnagum]

thank you sir. hope i can see more problem solving in your video. i have a subject right now physical chemistry and its not easy for me to understand only one example. thank you so much this will help me to pass my subject. love it.. we are using physical chemistry book by Moron and Lando.

[@depturreptic3512]

Thank you alot am contented sir

[@bqs175]

Edit: a video on Antoine's equation would be fantastic if you could make one!

[@mathiastolugu300]

Thanks for the example. Can you make a video about How the Clausius Clopeyron equation is derived?

[@Phabine]

LOL 6:13 that's how I felt after this video! thank you!

[@chemistNATE]

If it's P2/P1 then you'll have a negative in front of delta(H)(vap). They're the same equation, just written differently.

[@MeowFacegmailcom]

omg thanks I was just going back and forth trying to figure out why two formulas had the same name

[@buru44]

Thank you!!!!!

[@SmellyUnfortunate007]

Video: Tutor shows how the Clausius-Clpeyron Equation works with the end: "suck it up!". Me: Laughs unexpectedly after finishing Calc. 2.

[@chemistNATE]

@jalcazz If anyone laughs while doing chemistry, that's the best news ever. Thanks.

[@fazoonotila1302]

Very good ^^

[@jelloboquiren8530]

Thank you Sir

[@kawyasim1043]

Thnx a lot

[@XTRACOSCRUNCHIES]

THANK you!!!!!!!!!!!!!!! :)

[@XxAutumn4xX]

PLEASE POST AN EXAMPLE ON HOW TO FIND TEMPERATURE #DESPERATE

[@chemistNATE]

A negative could be absorbed to do that too.

[@XxJRHxXREDX]

I'm pretty sure it's "ln(P2/P1)" not, "ln(P1/P2)"

[@BlueBabyAkaAj]

You can write the equation either way. Long as your pressure and temperature correspond. So it can be ln(P2/P1) but your temp will be (1/T1-1/T2) OR ln(P1/P2) WITH (1/T2-1/T1). Hope that makes sense.

[@chemistNATE]

CallMe_ShanLee ^^ She's right. Also, you can flip the P1/P2 in the ln by adding/taking away the NEGATIVE on the other side of the equation. Yay math

[@mylobage]

Was gonna say the same thing. Also he forgot the delta an needs a negative - in front.

[@crywolfx6176]

i think the negative goes away when he flips the p1/p2?

[@tzheng1tube]

you are right

[@coquinne1957]

I watched your video just to find out why you cancel the k unit and your answer was " just trust me on that " -,-

[@budlight1835]

agreed kind of stupid thing to say but in fact they cancel because in the expression dH/ 8.314J/mol*K where mol*K are the denominator of the denominator, therefore, the K in the denominator of (1/298K - 1/373K)becomes what we could refer as the numerator and thats why they cancel. also is the same reason why moles of the dHvap cancel with the mole of the R constant

[@prinzecesartonares9332]

is there a universal entropy of water for me to use to calculate the pressure of water at different temperature ?

[@DarknessLPs]

I was half expecting a "fuck yeah" somewhere at the end

[@laelinurfadhilah5858]

Thankyou

[@rimsharana2782]

can you add things on your channel dealing with physical chemistry please? you are a great teacher!

[@chemistNATE]

I take requests! Facebook ChemistNATE or reply here !

[@bobdoleisawesome]

I love you so much

[@asdafasable]

Van hoff is again for one procces. right? i think you use the equation it fits with your data given . If you have pressured given you use clausius-clapeyron and if u have Kp you use van hoff . right?

[@inneralpha]

Will this give you the vapor pressure at equilibrium? if you have a bowl of liquid water in a sealed container with ambient room temperature which was sealed after exposure to open air for a long time, you can't expect the water to reach 3.64kPa right away. There must be some sort of natural response. Is there a way to figure that out?

[@m35926]

The kelvins cancel because kelvins in your R constant are the denominator of a denominator which makes them a numerator and then the other kelvins are in the denominator.

[@asdafasable]

Why Van hoff is exactly the same except of P2/P1 change for Ln(K2/K1)??? when we use that and when we use van hoff?? thanks

[@mariaorsic9763]

I think its P2/P1 and not P1/P2!! Thank you anyway!

[@Andr295]

1:54... He's gonna call the pressure his first temperature... Lol... What the heck, let's call the our first temperature our first pressure :P This guys is funny. Great video, btw! It helped me a lot :)

[@narqy11]

Referring to the right side of the equation, shouldn't there be a negative. I could be wrong but I'm getting a completely different answer.

[@HS-jg8ti]

Why did you remove the negative sign from in front of delta H/R?

[@rotaibi5086]

super