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.
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.
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!
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.
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.....
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
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!!
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 😂
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."
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.
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!
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!
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
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 .
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.
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?
+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.
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!
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
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
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.
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
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
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.
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
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?
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.
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?
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..
remember energy may take different forms. There is quantum energy (atomic forces) , electromagnetic energy (light), electrical energy, literally EVERYTHING even mass particles are made up of quarks, which are made up of standing waves of vibrating energy. That energy is made up of fluid-like quantum foam, which are made up of positive and negative virtual particles which pop into existence and immediately annihilate each other to balance the universe , and THOSE particles are made of literally empty space everything in the universe is purely energy and empty space; just manifested. that means energy is absolute and even the biggest changes in a system don't really have an effect on the universe. The energy is stored as potential energy; not heat (thermal energy). think of all the universes energy as a giant ocean and the reaction as a drop of water entering or being scooped from the ocean. because energy is fluid, it really doesn't matter where it goes. Just now that its stored as potential energy for now which means its not vibrating or anything to create heat. Endothermic is IN NEED of energy so it JUST TAKES IT from the environment. Exothermic has TOO MUCH energy so it JUST THROWS IT AWAY to the environment. It really is amazing once you think about it. This is why it is measured as CHANGE in energy! because scientists don't know exactly how much energy is in the universe. We just know the starting and beginning energy states and subtract that to see how much energy was lost/gained. Hope I helped you. i love chemistry. Im 15 so sorry
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!!
