Latent Heat of Fusion and Vaporization | Doc Physics

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[@John-ti8bf]

This is what happens when a physics student tries to explain something to his stoned friend.

[@yuhanliu6338]

😂

[@rainthecub417]

🤒😂😂

[@sapnaagarwal3054]

😹😹

[@jillwild23]

totally...

[@kiranjaiswal3099]

Its like Walter white and his student

[@user-Kassie]

lol the guy in the background

[@sapnaagarwal3054]

🧐

[@Nothing-zj7rf]

Lol

[@Food_Wagera]

Lol he's entertaining a lot♥️😂

[@JohnDoe-gb6co]

i love the way this guy teaches. he really holds my attention. thanks Doc!

[@the_3arab629]

Hi, i would just like to tell you that you made a mistake when you labeled boiling and evaporation at the same place. its quite a common error, but boiling and evaporation are actually two different things. Evaporation takes place at a very large range of temperature compared to boiling that only takes place when the temperature reaches the boiling point. For example if it were to rain at about 6pm, in countries like where i am (Kenya) where the temperature is not too low (around 20C at night), then in the morning we would find the water to have vaporized, how if it wasn't 100c? this happens because the water molecules at the surface tend to jump out of the liquid surface due to the kinetic energy. Here we can say: Evaporation only takes place at the surface of the liquid at a large temperature range where as boiling takes place at any area of the liquid (reason for bubbles) and at only a certain temperature (boiling point) depending on the liquid. Therefore during evaporation the temperature of the liquid can change but not in boiling.

[@DocSchuster]

The_3arab That's awesome! Very good point!

[@nomsy9279]

+The_3arab ;smart kid :) you're good

[@cijnslv]

Calm down lol.He is a teacher.I guess he'll understand if u just tell him his mistake no need 4 explaining

[@nomsy9279]

+Abdullah Al-Amri He has to know the point where the mistake is made.😊

[@fish3977]

also helps idiots like us.

[@k-waympati2800]

These videos are excellent for cramming... short and straight to the point...

[@Rose1997011]

Hi 1 year ago I was doing my AS and ur videos helped me get an A and a year later, here I am studying similar things are referring to the same amazing videos of yours. Many thanks Doc !!

[@nightfox380]

love the peanut gallery remarks in the background

[@freyahWF]

out of all the educational channels of watched, this is the first one I've subscribed to. As my former history teacher says, Good Stuff!

[@Shayne2110]

do you wanna yeah? do u have a yeah? yeah. XD

[@luckyy5553]

Sha

[@justdroppedin2997]

"like 10?" LOL

[@DocSchuster]

I prefer to call it liquifying, because melting sometimes makes my students think of water. But I agree with you in principle.

[@ianjaydelosangeles3173]

Youre informative and entertaininng at da same tym

[@saimeghana2261]

I love the entertaining part!! I'd be watching this guy's videos while my mom's like: "Are you studying or watching comedy?" haha

[@ryanhellier5093]

“... I don’t remember that” (no pause between comments) “YEAH YOU DO.”😂😂

[@Ok-nj6ld]

I wish I would have had a teacher like you back in the day. Thanks.

[@anber4129]

Wow, you are amazing!! I love your passion for physics and science in general! Great vid! To the point and phenomenal. ☺️

[@DocSchuster]

Heat is thermal energy. I am adding heat but not changing the temperature. Distinguishing heat from temperature is sometimes a tricky process, but it's SO important to understand.

[@directioneremo826]

great video :)..... you explain so much better than the teachers in my school, they barely speak good English :p

[@seifdeiab]

+Doc Schuster what does the area under the ladder shape like line represent?

[@vikkiernie8451]

Great instructing video for my physics exam next week :)

[@jontyroy1723]

I hope you're a teacher outside KZbin as well. :)

[@daMacadamBlob]

he is

[@deservewatching-5481]

very good >> no words... great way of giving a lecture... thanks DOC S.

[@benturner8181]

How do you guys know how long to draw the horizontal lines. I dont get it someone please i'm begging you if you are readig this please help me.

[@somi9891]

After 9 years, I'm watching this video cause now I'm having this concept in my school 😶 Good explanation and Amazing video 😊

[@user-mw6gm3mw2t]

state any suggestions to improve the experiment measurement of latent heat of evaporation

[@khaldounrahal3306]

Very good information presented in a simple way. Thumbs up.

[@Shayde7098]

Thanks for this, very informative. Helped me study for my oceanography midterm

[@jaredgeorge3702]

What is the state of the substance between the Liquid Melting.

[@tacomaliciouso]

can i solve for heat required without mass given?

[@Rantofthings.]

So Fusion can be related to cooling also ?

[@variousmentalproblems]

Will is my favorite human being.

[@ApurvPriyanshLuka]

What was P=I^2R?

[@siyabongachavangwane1504]

wow you teach awesome I love it, i'm definately subscribing

[@MrInfodump]

thank you for this! it’s really helpful to visualize this

[@erich3892]

Lovely father and son chemistry lesson

[@RonnyNgan]

I have a question. Steam at 100 degree C is injected into a melting ice block of the same mass. What is the final temperature of the mixture?

[@DocSchuster]

Yeah!

[@kevinmarquez117]

Very helpful and entertaining, thank you.

[@mrbob55304]

Disclaimer: It's 1/14/20 and I haven't reviewed all 152 existing comments. The bottom or 'x' axis should be re-labeled 'Time.' That is, the authors stated the heat input was a constant value. So you're simply graphing the temperature of the water over time. You're welcome. Significantly, this demo nicely illustrates why the "Blue Ocean Event"-- when most Arctic ice has melted-- will be game over for most life on earth. Humans included. You're not welcome.

[@aphondex]

Lmao the guy that said you'd need 10 apples to melt 1 kg of ice was totally clueless.

[@MXUguitar]

Great speaking voice :)

[@ayonmukherji]

Just saw this now. Evaporation and boiling are two separate things. We're studying these differences in our curriculum, I suggest you annotate a correction, cuz we don't want others viewing this to get confused. Great video tho! :)

[@DocSchuster]

+ayon mukherji Thank you! That was sloppy of me, indeed!

[@ayonmukherji]

+Doc Schuster Oops. sorry for so many replies. there was a glitch on my iPad, it kept saying error. but seriously, I love the way you explain, and I can see that ur passionate. also you respond. Thank you so much!

[@wildestofficial1046]

People like these help me get through homeschooling 😂

[@sheejamohan9145]

Waaaw got many things. Thanks for the vedio

[@DocSchuster]

My sloppy handwriting's secret code for the word: Liquifyin' or "turnin' into a liquid"

[@herenomore3167]

I love your energy.

[@xeon9299]

great presentation and very entertaining

[@hamzeali4481]

good presetation

[@xchopp]

This was great! I just wish some of the implications of condensing a lot of water vapor -- with the associated return of the **2.26 x10^6 J/kg of heat** -- had been woven into it. For example, the creation of an average-size cumulus cloud (made of liquid droplets from condensing of vapor onto nucleation aerosols) = the release of how much heat? A: A well-known meteorology textbook has this at about 1 Hiroshima-sized nuclear detonation. For just one cloud. At any rate, a _lot_of heat. I wonder what would happen if we gave our atmosphere more water vapor, say, by heating it up somehow? Oh wait, we don't have to wonder, it turns out we have been doing this very experiment for sometime now. More water vapor (in absolute, not relative terms) means more latent heat available to storms (oh, and more moisture too).

[@ellybailey6673]

This video was really helpful :)

[@JessieBmarie]

hell yes! I agree and was just watching HIMYM which makes this so much better!

[@avantimenon9290]

boiling and evaporating are very different.

[@farmerguy7406]

Boiling is just evaporation only faster since it's provided with heat and happens only at 100°C and produces bubbles.

[@duplicaatededits]

actually, farmerguy, boiling has a specific temperature at where the state change happens, whereas evaporation can happen at a large range of temperatures

[@mrgauravsher]

@@duplicaatededits ACKCHYULLYYYYYY moment

[@divyanshiupadhyay513]

If only my teacher was like this...

[@hamzakashif4449]

hey doc you are amazing. thousands likes and subscribes may you get. will help you achieve that.

[@kurdistanlover9737]

It helped alot thank u

[@Darh57]

In my text book it given 3.36 X 100000000. When I Google it says 3.34 X 100000000. In ur video it says 3.35 X 100000000. Which 1 is the correct latent heat measure for ice of 1kg.

[@DocSchuster]

Darsh Mehta Well, you could perform an experiment, but I'm sure your error would be at least one percent. So it doesn't actually matter. The values you've given are all less than 1% from one another.

[@Darh57]

Thanks

[@zackwalker2642]

I think you got the HEAT line and the TIME line mixed up.

[@gabor6259]

You misspelled liquefyin'.

[@ianedmonds9191]

I have a ski jacket that claims to harness transition and the latent heat capacity of some undisclosed molecule to regulate the heat of the wearer to around comfortable temperatures. Experientially it's a great ski jacket and I never get too hot or cold but I'd be interested to understand what molecule would be at the transition between liquid and solid and capable of being contained within some other layer such that the wearer didn't feel any change in the jacket. The material is documeted here: www.schoeller-textiles.com/en/technologies/schoeller-pcm.html Is this a lot of nonsense or is it using the principles described in your video?

[@DocSchuster]

Wow - we'll need a chemist to answer whether it's real, but it sounds wonderful! Pricey?

[@misssweethearted]

Amazing

[@abideleon6204]

Melting called Heat of Fusion, the amount of head absorbed by the system to go from solid to liquid. The video indicated the fusion goes from liquid to solid and that's incorrect.

[@Commonmischief]

Very true!

[@fayokanmifashanu1333]

It does latent heat of fusion

[@mikhwan97]

yeah I think so

[@captainlevi2457]

actually latent heat of fusion is the amount of energy for a solid to undergo a phase change hence it is basically the energy needed for a solid to completely melt so general his statement was correct

[@khawajagulmuhammed3563]

Hey who's the guy with you?

[@Mohamed-Madbouly]

what happens when i starts from the zero degree?.........does the graph also starts horizontally for a while like this...........and thanks in advance.

[@DocSchuster]

Mohamed Madbouly If you start at zero celsius, you have either hot ice, cold water, or some ice water. The fraction that is ice will determine how long it spends at 0 C before beginning to warm (all ice needs to melt first).

[@Mohamed-Madbouly]

Doc Schuster.i am a university student studying engineering and you explained this part better than my doctor did...really you are a great man.....many thanks for these videos...and merry Christmas

[@DocSchuster]

Thank you!

[@chazclapsaddle2529]

Mohamed Madbouly Why are you taking physics lessons from your doctor? He specializes in medicine.

[@Mohamed-Madbouly]

Chaz Clapsaddle you seem small minded to understand.

[@de-soldierman]

Nice vid

[@xeon9299]

subscribed!

[@meh_life3239]

You make me less terrified about my test

[@danaosama4247]

Liquid gains heat in order to change to gas, which means that Q is positive (in Q=mL) What is the sign of Q when gas changes back to liquid? Is it negative since heat is lost?

[@DocSchuster]

Dana Mo. Yup.

[@danaosama4247]

Doc Schuster I forgot to ask that, but where does the negative sign come from if latent heat and mass are both positive? Thanks :)

[@evanevans3405]

Damn this thing 8 years old and I got the balls to say that your "red" marker is orange

[@zionpope9491]

Very helpful !

[@dr_ltorres8289]

That General Patton joked deserved better :)

[@vickramshabaz2978]

bro i love thissss....really gets my attention finally a teache who teaches in english......🤣🤣🤣🤣🤣🤣🤣🤣other be teaching in chinese i guess.....

[@saadullahtauqeer3625]

You teach good

[@ianjaydelosangeles3173]

i should be paying u than my physics instructor...

[@DocSchuster]

Ian Delos Angeles Feel free, man! Mo' money, mo videos is what we say in these streets.

[@hemagaharwar7127]

Very good

[@shubhamshail3506]

You have written "fusion" and "solidification" in the same direction. But actually they both are opposite of each other . Fusion is change of solid into liquid however solidification is the change of liquid into solid.

[@karamatmohammad5985]

fusion and melting is the same. and also evaporation is not the same is boiling. boiling occurs in the temperature where the vapor pressure is equal to external pressure (stove), and once the external pressure overcomes the vapor pressure the molecules of water will evaporate.

[@Phytoblaster]

Although we see massive ice melt in the arctic and antarctic as icebergs the size of Delaware are breaking off the continental ice sheet, the latent heat of fusion is the reason that we don't see dramatic changes in global temperature. The ice can only absorb so much heat energy. As it melts, the temperature buffering capacity of the global ice sheets decreases, leading to exponential rise in the change in global temperature. Yes, global mean temperature is rising, faster and faster. Thermodynamics never lie.

[@DocSchuster]

Slick. I think we'd get along.

[@saimeghana2261]

At 1:56, why did ya say 'shut up'? What did the other guy say?

[@DocSchuster]

Sai Meghana You wouldn't even believe me if I told you!

[@saimeghana2261]

Maybe I would!? :P

[@kingcodetv185]

Sai Meghana i heard "Id say 32"

[@saimeghana2261]

KingCodeTV Lol yeah it does sound like that but it's probably something else..

[@chazclapsaddle2529]

He gave the temperature in Fahrenheit. The nerve of some people.

[@jsofdockr4572]

Isn't evaporation different from boiling?

[@DocSchuster]

Tell me how.

[@NightRatez]

Doc Schuster I think evaporation happens all the time, while boiling only happens when the fluid is at its boiling point. But i guess in this case you can use evaporation as well... anyway thanks for the informative vid.

[@DocSchuster]

Ooh. I like that. Wikipedia says "vaporization" is the umbrella term and evaporation and boiling are the two types. THANK YOU for the clarification.

[@JuiceBoxBoiii]

Hi really loved your video and the guy in the background.. his voice is so cute xD

[@cheskajoyce541]

I like this guy

[@Th3End0fUs]

Thx!!!

[@anotherdoseyt]

😂I can't tell if the other guy is being serious of is just there for comedic relief

[@captainlevi2457]

his purpose in the video remains questionable.

[@truemessage7069]

Thnks

[@proenrichment]

Gd explanatiom

[@janakprakash3586]

is it just me or does he sound a little like barney stinson ???? anyway i love your vids

[@John-ti8bf]

where does your friend buy his weed from?

[@sujasofia2883]

U rock

[@sshirish9167]

That guy in the background :-P :-D!!!!!

[@didnot2000]

i like how the guy played the stupid part, it made me laugh Shut up!

[@ayubkara1092]

your voice remind me of Deadpool +_+

[@roxannejiang2136]

solve that sucker

[@CTMeRJ]

Actually, I believe you are heating the ice by adding thermal energy. You're not adding heat.

[@Xepouniq]

v help[ful

[@notmimul]

ME GUSTA...!

[@lettersfromanihilist9092]

their dynamic tho

[@gabrielroa3037]

"oh u wanna , yeaah"

[@noel6187]

“do u have it, yeah”

[@gregreeve3363]

Labeling the RHS as steam is wrong. Steam is still visible water. Should have been labelled as water vapour, which cannot be seen, but which surrounds us in various quantities in every day life. Other than that, I like it.

[@90798]

like for the teacher :p

[@mrbitu4713]

What's are you explaining lol your background 😂

[@cutegurl567]

he sounds like John Stamos

[@l.marcadella4099]

Like 10 apples man!!!!