Introduction to Thermochemistry and Enthaply

[@Adrijcardenas]

Tyler DeWitt is the only reason I'm doing somewhat decent in my Chemistry course. You deserve all my tuition money, good sir. My professors are worthless.

[@akshitaalikesramen5721]

It's not that they are worthless, all teachers deserve some credit for teaching what they teach everyday. (No, I'm not a teacher.) But, yes, Tyler is quite a good teacher and strives to make learning fun for all, especially in the sciences.

[@name.7098]

Yes .😁

[@thegoodally101]

My professors don't even teach lol

[@tdewitt451]

I haven't made as many videos as I'd like on these topics, but I do have some. Next, watch "Phase Changes: Exothermic or Endothermic?" and then "Tricky Question: Exothermic or Endothermic?" You can follow those up then by watching the Food Calorimetry videos that I have. And then "Thermochemistry Practice Problems" is good too. I hope to post more thermochemistry videos soon!

[@uglybozo]

LOL 8 years ago

[@manishabocus668]

Hi there, I haven’t found the previous video for energy and conversions you mentioned in the beginning of this video. Can someone help me please?

[@Abbe_Faaria11636]

After 2 years of struggling to understand enthalpy, you explained it to me in just 16 minutes. You have my utmost respect.

[@tdewitt451]

Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.

[@novaknight2256]

You should continue to make more videos, you’re an ace prof

[@olusholawilliams5917]

Thank you so much Mr. DeWitt your videos are really helpful and timely blessings. Could you please do a video on enthalpy and phase changes?

[@beautifulworld2466]

Sulphuric acid is concentrated or dilute

[@noahallen1576]

Not all heroes wear capes, some wear lab coats.

[@JC-xk8vh]

Even in your throwback videos, your examples and explanations are much clearer and better than my current professor. Thanks Tyler.

[@josejones8837]

incredible! 10 minutes on youtube can do more than 2 hrs in lecture...the only difference? the teacher wanting to do his/her job!!! thank you Tyler

[@sonika4175]

Earlier 😒chemistry used to behave inert with 😓me, but after watching your video, now it starting bonding with me, 😊 the way you teach is amazing😘, U are the best chemistry teacher in this universe,and thankyou 🙆for your videos.....

[@subprabhart771]

The reason for my love towards chemistry is you sir.Thanks for making me fall in love with chemistry

[@scifreak5504]

Tyler, you're absolutely the best! It's just because of you that chemistry is my favourite today. Thank you so much!

[@ultrasmitestinct1327]

I can’t believe I’m just coming upon this channel today! You, good sir, will definitely help me do better in my chemistry course and by extension in getting my major! Thanks a lot

[@alphaa.9151]

Woahh this video is over 10 years old now.. still so helpful!

[@cat5220]

This is so helpful! Your definition of enthalpy makes it ten times easier to understand! I’ve been really struggling to understand what enthalpy actually IS, but now it makes soooo much sense. Thank you, thank you, thank you!!

[@shayerasherzai5319]

tyler dewitts videos are the only sicence videos that i dont want to end. thanks man for making it easy for us students to understand chemistry.

[@ashleyl930]

I've been struggling with understanding when the change in enthalpy is negative vs positive and this video just helped me conceptualize it so much easier, thank you so much for posting this!

[@swegasaminathan9812]

Please continue teaching and uploading videos. Ur work is literally changing the way we look at chemistry

[@ChiSoxEdits]

Tyler has an amazing way of teaching. he doesn't use many big words when explaining things

[@normaarambula3608]

You are awesome, I wish all professors would evaluate their teaching skills. It takes more than just knowing the subject to be a great teacher, you have to entice your students to be able to learn a complex subject like chemistry. Thank you for your work.

[@samaikhyaa]

I don’t know if you’ll read this or not but I just wanted to say thank you so much for your videos. These are so clear and easy to understand especially for someone like me who has difficulty learning all but 1 subject and people like you who break it down every single step, assume the viewer knows nothing while watching this video, and demonstrate these difficult concepts in the clearest ways possible are the reason why i have a 100 in chem now!! super thankful for you and i hope you win a nobel prize or something you literally saved my life :) and because your 16:53 video taught me everything about thermodynamics that I needed to learn way more than 5 of my chem teacher’s 90-minute yapping sessions 😂

[@jackstein9986]

The only reason I'm not failing chemistry is this man right here.

[@pbredcat]

my chemistry teacher is doing phd and his teaching skill is almost equal to zero... but u r awsome mr tyler...i do respect ur teaching capability...u r just making me fall for chemistry....keep it up...great job sir

[@anysianas5099]

You’re the best of the best if chemistry was explained like that students will not ate science.

[@Tisula1]

You are an amazing teacher. Genuinely easy to understand. Well done and thank you.

[@name.7098]

Yesterday I got 80/80 in my class 10th exam in chemistry Just because of your great teaching experience and skill... And I know that I will clear my national level chem olympiad because of your videos Thanks a lot .

[@tdewitt451]

That's a *really* great question. You're exactly right--the heat is energy the atoms and molecules need to change during the reaction, and doesn't have to affect the temperature of the system. But some endothermic reactions do get hotter: for example, check out my video called "Phase Changes: Exothermic or Endothermic."

[@Msdeliciaxoxo]

Thank you so much for these videos these are beyond helpful Ive been struggling I chemistry and finding your videos has been a lifesaver

[@boratbruno4947]

This guys is super cool and humble at the same time. Great professor

[@jadeherrera4928]

You seem like a gentleman, great sir. You’re videos are very helpful too, thank you!!

[@anysianas5099]

What could I be without? You saved my all semester thank you so much

[@B.z-d6e]

I dunno how to express my appreciation, thanks a million for all your efforts. I hope you make more videos about acidic rain and other topics as you are the only one whom I can understand from him. Ps. Not all your videos appear to me when I enter your page and I couldn't find more videos in your website.

[@marymessam2435]

Even after 9 years , your vedios help so much

[@sweethorizons123]

Creative video, love the analogy that you made with the exothermic reaction and money

[@serene9532]

Best video on KZbin for this topic!!! Thank you so much ♥️

[@SpinachTea]

I can't seem to find the "Energy Conservation and Conversions" video you reference at the beginning of this video----anyone out there able to post a link in reply to this message?? Thank you!

[@kerminayoussef6617]

Ah wow I can just don't go to school and just watch you while I'm pretty sure that I will get the full Mark in chemistry test .. thank you so much

[@SammamishChemistry]

Tyler, you are a favorite 'guest speaker' in my ap chemistry classroom. The students report that they really enjoy the way you use paper with the webcam, models, and hand gestures. You are very clear! There is one misconception, however, in this video, that many good biologists state that is simply incorrect. If you are interested in a discussion, let me know how we can send email without posting our email addresses on the web!

[@kofipapa2886]

@Sammamish Chemistry. I would love to share ideas with you about chemistry.

[@gitamohabir2288]

Cheers Bud U make it so easy and with good clarity U have a very good understanding of this subject A very +Delta H U exothermic knowledge and we endothermic knowledge U keep giving and we keep taking Ramelite

[@anneowens7632]

You are a great teacher Tyler!

[@katebrumfield8808]

“In addition, I know what I’m doing” wish I could say the same

[@snowqueen4419]

ur the beast... u made me get an a in chemistry... thanks frome Libya..

[@daena9289]

Love the video quality.

[@Daveit93]

You sir deserve the highest honor :)

[@zeze220]

Thank you so much this video helped so much

[@ittookmetoolongtothinkofthis]

Sorry to bother you, but I can't quite seem to find your video on "Energy Conservations and Conversions". Did you happen to take it down?

[@JC-xk8vh]

I couldn't find this video either. 😢

[@beehabesha3]

Same here

[@croaker260]

same here

[@luthmhor]

Same

[@nik_the_gamer6579]

same

[@whiterosexoxo2715]

make more videos!!! Your'e so good at this I'm understanding so much better because of you!!!!

[@marklandau365]

lookit puppy Tyler! sorry. but seriously, you always cover a little more necessary ground even after if i've been exposed to a subject somewhat. this is invaluable to a struggling student of sciences. thank you!!

[@maroonhorizon1693]

omg i didn't even recognize you! thanks for the help!

[@DynePodadera]

Hi Tyler, I dont really get it. Endothermic absorbs heat from the environment, but how come in the video (NH4Cl and BaOH2 reaction) gets cold and you called it endothermic? Is it supposed to be hot since it ABSORBS heat? If it isnt, then where do the heat goes?

[@tdewitt451]

Great question. This is a really tricky concept. For help, check out my video called "Tricky Question: Exothermic or Endothermic?"

[@switchdv]

+Deyn2011 A little bit late, I guess, but I suppose I'll make it a bit clearer. So, what we feel from a chemical reaction is actually what surroundings of a system would feel. In other words, we are the surroundings ourselves. System releases heat = Exothermic System absorbs heat = Endothermic If a system releases heat, which is exothermic, that means the surroundings absorb heat from the system, hence we feel hot. If a system absorbs heat, which is endothermic, that means the surroundings release heat to the system, hence we feel cold. Though, this theory doesn't apply to every thermochemistry process. There are a few exceptions.

[@berreyl1689]

hi from 7 years, I also have the same question lol.

[@baltazararoasolrojas5083]

Wow! I think its gonna help online classes. Thanks!

[@salzxd]

Thank you so much for your reply! You're an awesome teacher. I will definitely check out that video, because I'm actually learning that at the moment.

[@ShadowTriadWestWind]

Thank you Mr. DeWitt, your vids are really helpful.

[@scifreak5504]

Great explanation! Thanks a lot!

[@limeskies8287]

Here watching this in 2022. Still more helpful than my textbook.

[@Pineapplex1990x]

amazing video so helpful. wish u were my teacher i'd learn so much.

[@likemike252]

If you got a penny for every test you helped people Ace, you'd probably be richer than Mark Cuban

[@michellequinn7721]

Thanks. This is really helpful

[@adamperalta187]

I can't quite seem to find your video on "Energy Conservations and Conversions". Did you happen to take it down?

[@jasmindiaz6049]

I love this man

[@Don-ug7ki]

Love this dude ❤

[@b_08_amitkumarsahu90]

you are a super hero without cape

[@nchris]

Awesome explanation.

[@HanSoloxcs]

7:55 for Math part.

[@vonhudung1]

really easy to understand, thank you for you very good video

[@milkywayandbeyond]

I know that during an exothermic reaction, the temperature of the surroundings increases due to chemical energy being converted into thermal energy (and the reverse for endothermic reactions), but does the temperature of the system (the products and reactant molecules/atoms themselves) also experience a change in temperature, or just a change in stored energy? Thanks a lot for the help.

[@airman9209]

LOL! How big you smiled when you talked about lighting the match and dropping it in the tank of gasoline LOL! Are you secretly a pyro? lol

[@canadianhaitian]

Oops I just saw that someone else had the same question and you told them to watch your video about this tricky concept. Ok I will do that

[@matiullah7804]

Hello there, Enthalpy, doesn't it mean to absorb moisture in the negation? Molecules do absorb mist to enthalpacise the thmo-reactions.

[@tex10210safety]

Hi Tyler, I really enjoy the way you explain chemistry and I have a question regarding Enthalpy and the many equations. Do you have any type of simple explanations that will help me to determine which equation to use for the problems given on homework. Thanks, Robin

[@antoniomaldera8603]

Thank you Tyler, very nice.

[@ziknico2614]

Sir i cant find a proper series of videos I m confused from where to start Please help me out I mean after this which video should we see and before this which 1

[@Kpspen]

You're very helpful, thanks

[@chiltonkillsyou]

Good videos tyler. What is your educational background? M.S, PHD?

[@canadianhaitian]

So for endothermic experiment if it was pulling heat from the surroundings into the system how come system for cold instead of hot?

[@Jonderland]

So young! Baby tyler 💙

[@ShadyNavi]

thank you for this video, you're awesome.

[@jamesnagle4785]

I understand the concept, but with positive Enthalpy reactions (like the ice pack), where does the heat GO? You would think intuitively that if it is absorbing heat, then over time it would get HOTTER? Like heat given off from a bonfire going into your hands, WARMS your hands... How does that work?

[@Deborah_Albuquerque]

when u have a positive enthalpy It means the reactions needs more energy , so It absorbs heat to turn the reactants into products, so basically, the heat goes to the solution u r working with..

[@myvedio2011]

I would like to calculate internal temperature of Polyurethane Foam block. could you make a video ?

[@rafaeldelaflor]

Are those gloves really useful with sulfuric acid? Are they any different than the home depot latex one size fits all?

[@ahmedhaniali3292]

hmm...my question is more of thermochemical equations. so can u make a vid about advanced thermo-equations. my midterm exams are close and well, practice might help me so if u could focus on the concept of how far in state can u go with a specific amount of joules. for example u have an ice cube that is at -20C and u have an amount of 35kj to use so how far in state will this cube of ice go? given cube mass=100g given energy=35kj (deltaH of fusion = 6.01 kj/mol) ( deltaH of vap = 40.7kj/mol) (C of ice = 2.09j/g dgreeC) ( C of water = 4.180j/g dgreeC) ( C of steam =1.84j/g dgreeC) and molar mass of H2O is = 18g/mol. Pls help me and solve this equation. :D

[@uintasc]

This is in my chemistry class and I am having trouble with the nature of light, determining the energy of 1.80 mol of photons for each kind of lights ex infrared radiation (1600 nm), visible light 490 nm, and Ultravioliet radiation 155 nm

[@hadiii101]

i just tried to find your your video about energy conservation and conversions, but i didn't find it.! can you post its link ? thanks for your continual help.

[@malayapaul458]

it's really awesome because the teacher is awesome!! but I didn't. understand what the delta h is ,what's it??

[@purva_vj]

hey! i just wanna know.. in the xperiment (NH4Cl and BaOH2 reaction) if it absorbed heat, than why its cold ??

[@TheBlockbuster1000]

+Purva tomlinson The environment gets colder

[@esa2236]

so if I dipped my finger into the NH4Cl and BaOH2 reaction which is the system, it would be hot because it sucked in all the heat/energy from its surroundings?

[@esa2236]

You just explained an exothermic reaction, but NH4Cl and BaOH2 forms an endothermic reaction. That is why I asked if I dipped my finger into the solution in the flask, would it be hot while the surroundings of that flask would be cold.

[@esa2236]

***** Ah, so it'll feel cold because the solution inside the flask would be taking the heat from my hand.

[@GoodVibrationsSound]

delta money helped a lot

[@netadosalazar]

Nice video!! Thank you

[@LegendaryStory]

It'd be awesome if you did more chemistry videos. >.>

[@joanaclement7449]

still watching in 2023

[@Deborah_Albuquerque]

I loved It!!

[@ELMKTF]

Fantastic!

[@masonrobbins1877]

how does one film with that low of a resolution

[@sarahlol7899]

watching this bfr my chem exam in 5 hours

[@satevamarie3597]

Thank you so much!

[@readyplayerdan5732]

That 4K quality tho

[@natarsya9396]

you remind me of Hugh Dancy for some reason :P But thank you so much for the information! :D

[@hamzaahmed9224]

SOMEONE ANSWER:-Why Total Enthalpy of a system cannot be measured??

[@ohmsspark7711]

really good thanx

[@AsnakewYeshambel]

Why didn't you learn about chrmotography and organic parts means aromatic,amins,carbonyl cpd

[@barbarafagundes1019]

Thank you!!!!

[@hhuston9]

Thank you! you should be my teacher! haha

[@jacobp.j4602]

I wish I could give a 1000 likes :).