I love how he explains things as if I were 7 years old but without it seeming insulting

Jesus coming to save me for my chem exam lmfao

Most underrated science channel. College hack

i manifest that i will have 96 and above grade in advance chemistry, pls lord🙏🙏

Dude you are a beast man. Your videos are short and sweet goes straight to the point, keep it going David Grohl.

I owe so much to your channel, Professor. Your videos are direct and very easy to understand. I'm studying for an admission test and you have been such a big help.

I'm so glad I found this channel BEFORE my final exam! Cramming for a midterm tonight and I've learned so much in just one hour. THANK YOU!

I watch the ads all the way through to make sure my chemistry Jesus gets his Adsense 🥺✨

I had to miss a class on this yesterday. What I watched in this 4 minutes taught me almost everything that my classmates learned in 2 two hours. Thank you so much!

I'm going back through material to study for my ACS exam for GenChem II, and he has been an incredible help. He explains concepts and equations so simply I don't feel like I have to spend hours trying to figure it out. Thanks Professor Dave!

Your vids are making my MCAT prep more feasible. Thanks!

This taught me more in 4 minutes then my chemistry teacher has taught me all year

Very informative series. The men like PROFESSOR DAVE are the essence of the humanity. If he continues to lots of other chemical topics he will be welcome. May God bless him time and enthusiasm to teach many other difficult topics in physical, inorganic, organic and applied chemistry.

I love this guy videos. He can explain everything very clearly.

Thankyou for the video on Thermochemistry: Heat and Enthalpy.

Your videos are my holy grail, thank you so much!~ You explain it so clearly & the visuals help so much.

This man taught me thermodynamics in half an hour which my chem teacher couldn't in half a month. U r amazing sir ! Keep up the good work!!

You explained this in a 4 minutes video better than a 2 hour lecture by my professor

This is exactly the information I was looking for. Thank you!

2:32 Thanks Dave, this is the first time I learned the difference between dietary calories and chemistry calorie.

Tbh I stil dont understand what I'm doing

the most important point in thermodynamics you said ,.. thanks Prof. Dave!!

Thank you.This video was helped me lot to clarify my answers.This is the best channel for science students.

2020 and he's still the best!

this was so clarifying and concise thank you sir

when he said delta H is energy in bonds of product - reactant that just saved my life

Thank u so much. So impressive and easy to understand

Thank you so much for these great videos. Summing up with the comprehension check is awesome! Very very helpful! Thank you.

I am so thankful for this video man

Thanks for this video!

Thank you Professor Dave

Studying for ap chem test this is really coming in clutch

Not sure why I need to attend school anymore? I just learnt more in 58 seconds than I have all semester. Thanks for being the awesome science teacher that don't have!

Professor Dave, you're the man.

Thank you so much for your videos sir, your videos have been very useful for both physics and chemistry in my current academic year.

Thank you Proffesor for helping us😁 in this subject,

Seen once. Shall be seen again. Good vid.

Thank you for existing

Thanks, you're better than my actual professor.

Love from India professor your teaching is So Amazing

Professor Dave is the GOAT.

I finally understand enthalpy from ur 4min vid, and its better than those 40min or hour and a half crappy vids!

at 3:45 why did you change delta H to a positive in the actual equation when it was originally a negative ?

Thank you Professor Dave for your explanation of enthalpy. Could you please make a video to explain effect of expansion valve in thermodynamics. what kind of effect it does on gases and gases take energy from surroundings.

Thank god there are people like professor Dave who can actually explain the material eloquently and in an interesting way and not bore you to death like my stupid chemistry teacher in school.

Thank you soooooooo much. SO SO SO SO SO SO SO SO SO much!

I love this channel

im currently a student living off of subsidies but i promise! when i get my first paycheck when im graduated! i WILL make a donation to you to THANK YOU!

THANK YOU!

Correct the unit of it :- ∆H = -890.3 KJ/mol

Very nice your teching .

Thank you so much

Love your vid professor :D

Thank you

Sir u are the wonderfull teacher awesome sir

Go on Prof.

Thanks . very nice teacher you

+Professor Dave, do you have any videos where you talk about nutrition and exercise? I want to know more about ketogenic diet, muscle building and healthy foods.

Shouldn't the 2nd answer at 3:10 say that the delta H is -1780.6kJ, not kJ/mol? It is still -890.3kJ/mol regardless of how many moles you combust, correct?

Best "Guru" ever....

I LOVE YOU DAVEEEEEEEEE 😘😘😘😘

Thanks sir.

Damn man your videos really helping out for jee

The explanations helped me a lot, however the "comprehension" I had trouble with because I learned it much differently

I have a question, Don't you have to know the aggregation state to calculate enthalpy? Or is there a way to know it without it being mentioned in the question ...

Excellent lesson , thank you and good bless you.

Sir i just have one request can you please make a Playlist !!!

Great sir

Thank you professor Jesus

My freaking savior

TNX

Good video. Could you please answer my question professor or anyone who is an expert? So if enthalpy of products is lower that means (u+p*rho) is lower. But the fact that heat is released and the temperature of products is higher means that "u" or internal energy must be higher! How do I reconcile these two ?

What is the difference between q and H when both are defind as energy

Chem final tomorrow anyone?

Thank u so much 🤗🤗🤗🤗🤗

2:29 My mind just exploded

Q = △H when T and P are constants ? Have just P as a constant is sufficient, no ?

Good

is there any terms that define the property of material,if it requires 60 sec to change the temperature by 1 degree in ambient air.

I really like this channel; however, the first part about bonds has an issue. Bonds do not "store energy." It takes energy to break bonds; it releases energy to form them. So to keep with the correct sign convention, an approximation of enthalpy should be reactant bond energies - product bond energies, NOT product bond energies - reactant bond energies.

Thank you, chemistry Jesus!!!!

Hi sir, I watched your heat and enthalpy video at now, that is really very nice sir however in your end of the video you gave the comprehension question for find the answer and at the same time you are giving answer also but i don't know how do i find the answer so would you please explain the heat formation and how did you are calculated the answer from the comprehension

Is the amount of heat denoted by q is the same as H (enthalpy) contained in the law of ΔH=Hp-HR In short, is the amount of heat q the same as the enthalpy H?

In this equation ΔH = (q + w) + PΔV: Can someone please explain the difference between work that is part of the internal energy and the other PΔV-work?

Can someone help me through this dilemma? Work is defined as the (W = F * s) when a body moves a straight distance under a constant force. However, since for a curved path of varying force, we break down the curve to infinitesimal segments where the Force is locally constant and the distance (ds) is essentially straight. Thus, for this tiny line segment, we apply the Work concept and we have dW = Fds. Summing up all the dW would give us the total Work. This is why dW = Fds (and never dW = Fds + sdF). I have the following problems: Under what circumstances is Enthalpy explicitly defined for a system? How can we say that dH = du + PdV + VdP when we never say dW = Fds + sdF?

Bill gates wants to recreate butter with this.

Love u dave

that means enthalpy is change of energy during a chemical reaction

Chemistry Jesus. Thank you!

Mister! when to use kJ/mol and only kJ in enthalpy change??

love that opening 😂

Professor how is enthalpy u + pv?? Is there a formal proof?

my saviour

what is the difference between enthalpy and amount of heat tranfere

Hi could you pleas walk me through the calculation. I get that 16.0 g is the molemass but why divide everything by 1 mole? If use the formula m/M = n then n X 890 i get the same answer but units won't match.

For those who are confused about conventions and saying the conventions in physics and chemistry are different It's same . It's different because of the different way we deal those things in physics and chemistry. We focus about the change of internal energy in chemistry but we focus on the heat and work done by gas in physics. for eg When heat is supplied to a system of gas and it expands , in chemistry we write ΔU = q - W (W as work done by gas) So If I add Heat to system it;s internal energy increases , right ? So ΔU should be positive (U2-U1) U2 will be greater than U1 . So change will be positive .So , there's a positive sign. And When gas does work , it's spending it's internal energy to do work . So , if you hadn't supplied heat to the system , ΔU will be negative , (U2-U1) , as U1 is greater than U2. So that's it. ΔU =+q - W So for the same scenario in Physics (Adding heat to the system and gas doing work ) , this would be the gas Added Heat = Positive change in Internal Energy of gas + Work done by gas It's the same as if you had $200 and you spent $100 on foods and $100 on rents. SO $200=$100+$100 You gave something , you get the things out of the same worth . So in Physics that would be Q=ΔU + W Notice the + there. It's not convention there. It's a simple math like I did in above money example. Let's make this exact same thing like I did for chemistry. When I put "W" on Left hand side , It will become , Q-W =ΔU Same equation I hope you understood. So again, it's not the convention. It's how we deal with them. But it's easy and time efficient if we deal them differently using the conventions.

someone explain the comprehension part is that a formula i have yet to learn?

If a chemical equation has a delta heat value given, if the heat value is negative, does that mean the reaction is exothermic? just double checking, it can be kinda confusing, i love your videos thanks!

Great video, really helped explain things. Looked up "Thermochemistry explained" and this came up. Just a suggestion: I would put your "cred" on your twitter or "about" page on youtube since you don't have an official website. Otherwise I can't 100% trust everything you say (since it's the internet). IDC if you're a Harvard Grad that works at NASA or just majored in Chemistry and sell dogs for a living, I would like to at least see that you've done at least Highschool level chemistry, as a consumer. Just a tip! Looks solid, though!

Hi sorry but i dont understand how dix you find this result attend the end or thé video , can you please explain it ?