Thermochemistry Equations & Formulas - Lecture Review & Practice Problems

This chemistry video lecture tutorial focuses on thermochemistry. It provides a list of formulas and equations that you need to know as well as the appropriate units. It provides a nice review covering topics such as the internal energy of a system, the surroundings, endothermic vs exothermic processes, work, pressure, and volume. It explains the difference between work done on the system vs work done by the system. It also shows you how to calculate q, the amount of heat absorbed or released by a system for processes that involve a temperature change or a phase change including the specific heat capacity concept of water. This video also discusses thermochemical equations and reactions and how to do thermochemical stoichiometry and conversions. This video contains plenty of examples and practice problems.
First Law of Thermodynamics:
• First Law of Thermodyn...
Thermochemistry Equations:
• Thermochemistry Equati...
Internal Energy, Heat, and Work:
• Internal Energy, Heat,...
Thermochemical Equations:
• Thermochemical Equations
Specific Vs Molar Heat Capacity:
• What Is The Difference...
________________________________
Basic Calorimetry Problems:
• How To Solve Basic Cal...
Final Temperature Calorimetry Problems:
• Final Temperature Calo...
Latent Heat of Fusion & Vaporization:
• Latent Heat of Fusion ...
Coffee Cup Calorimeter:
• Coffee Cup Calorimeter...
More Calorimeter Problems:
• Bomb Calorimeter vs Co...
__________________________________
Specific Heat Capacity Problems:
• Specific Heat Capacity...
Hess Law Problems:
• Hess's Law Problems & ...
More Hess Law Problems:
• Hess Law Chemistry Pro...
Enthalpy of Formation & Heat Combustion:
• Enthalpy of Formation ...
Enthalpy Practice Problems:
• Enthalpy Change of Rea...
__________________________________
Speed of Light, Frequency, & Wavelength:
• Speed of Light, Freque...
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
/ collections

[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/ Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections

[@kellengallagher5008]

My thermochemistry test is next period and this is my first time finding out what thermochem is.

[@incognito6751]

Uh, how'd it go?

[@lucsy2433]

@@incognito6751 lol good question

[@nothingisreal6816]

@@incognito6751 Not too good I assume

[@ctl4l1f37]

Me too and my test is at the end of class 😁

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DUDE SAME

[@cariboux2]

I just wanted to let you know that you are an outstanding teacher! If everyone had you as their prof, no one would complain about chemistry being too hard! Thanks so much for making these tutorials public.

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U have to read😮❤ newton,s precipia

[@cariboux2]

​@@michaelgonzalez9058That would probably be a life-long endeavor. 😅

[@ishabalboa]

That helped me understand a lecture of 2 hours in 21 minutes, thank you so much, Online Classes just aren't for me

[@alphaze5944]

We had an 8 hour class for this, I just skipped it and watched his vids

[@oriahware2541]

Same

[@leptic1744]

Bro is this not an online class

[@RaffaelloLorenzusSayde]

True, in my opinion, teachers and professors take that long on purpose like they could have finished earlier, but they decide to finish nearly at the exact time because of institutional guidelines that they have to follow including the pay per hour rule.

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Same

[@dressedtight6447]

You got me through calc and are getting me through chem. You're a celebrity in my eyes

[@JuanMendoza-fw2pe]

I've actually been teaching myself all about thermochemistry equations and your videos are so clearly spoken that it simplifies it all. Thank you for sharing your gift.

[@triple_gem_shining]

if youre watching videos of it youre technically not teaching it to yourself. LOL

[@Hyperstar5]

thermochemistry test tomorrow, wish me luck my friends ( still not prepared lmao )

[@a199719971997]

How did it go, fellow chem major.

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Random Single Guardsman He dropped the course :/

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she*

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Best of luck dude

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Are u Korean?

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if u read this comment you're getting a 5 in AP Chem

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sweet

[@JJWAD]

by you saying that it's obvious you got a 2

[@zaydshah8248]

amen

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our grading system is reverse and 1.0 is the highest grade. 5 meaning you're probably on academic probation lmao

[@jiovani3447]

Engineering**

[@wcowrules1939]

I have learned more from him than any chem professor

[@twomfan2]

I feel the same, but you gotta remember that repetition is key to remembrance. Maybe your professed layed the groundwork by exposing it to you and this vid help build upon it? Or maybe they're just bad professors haha

[@brandondillow106]

yes

[@Nemoguzapomnit]

18:25 2×-286 = -572 and so the answer is -180. And great thx for video!

[@apoorvashekhawat8619]

Ikr! I was solving with him, so i thought i got it wrong. Noticed his mistake too. But the video helped me so much!

[@kenjikakashi]

Thank God i'm not the only one

[@Nombeko]

Thanks

[@aunetjie1559]

I almost got a heart-attack!

[@jdorsett4157]

yup noticed this too 👍🏾

[@seanandrews4916]

My lecturer took 3 weeks to cover this and confused everyone. You did it 21 minutes and i understand perfectly

[@noirblanche3729]

You inspire not to use a calculator every time. I love this. This helped me a lot. Thank you so much

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NOir Blanche i

[@Sammy-bi9fj]

can't use a calc on the A.P test sooo....might as well (multiple choice section at least)

[@cassandra-lynnecowley6475]

Just an FYI for you, towards the end of your video when you have the equation (-393) + 2(-286) - (-785) ..... You calculated that 2*-286 was 576.. but it is actually 572. which would make the actual answer to the equation be 180. just thought i would mention.... LOVED the video though, really helped me better understand.. I have a midterm on Saturday .. here to hoping I pass.

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I can’t count how many times I’ve had trouble in chemistry and this guy saved me.

[@mahalfatah7783]

My thermochemistry test for ib chem is in 25 minutes. This man is a blessing

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uni gen chem finals tomorrow im right there with u

[@AK-op4be]

Chemistry is sooo much info, first you need to learn all the vocab & understand whats going on, then memorize the equations to finally be able to do the practice problems 💀 but atleast if i dont learn from my prof, I can learn from other teachers on youtube like this one.

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I hate ths bro i wanna die

[@SarahNiazi-ly6en]

I'm a 8th grader trying to learn thermochemistry and you're helping me more than you could ever know Thank you so much

[@islamicbrotherhood9574]

Add some more videos on thermochemical calculations but tough ones please please...

[@Nick-hj8eo]

Thank you so much for this, it hopefully will help me pass my CHEM 1800 mid term the course moves way to fast so summarizing important stuff into a 20 minute video such as this is a great help!

[@Viz_lifelore]

if I just simply watch these videos, my basics are going to get SET FOR LIFE, I didn't know it was this simple 🎉

[@michellwaterman3160]

I appreciate that you take the time to solve the equations without using a calculator. My chemistry professor isn’t that cruel, but my calculus professor IS. All these little tricks to combining very large numbers without a calculator has been a lifesaver! You and Professor Leonard have gotten me through my last semester as an undergrad.

[@akintundeenoch9498]

Am so much happy finding out much on thermo chemistry, and for the second to the last equation, the answer is 180kj/mol

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This this was a better explanation than my book,, thank you so much!

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Somebody has to pay you more for helping out so many freshmen :D

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[@enriquepalomino8636]

you should do the sample with the units maybe for students wondering how you went from g of water and C degrrees to J.

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I HAVE EXAMS TOMORROW IM GOING TO CRY

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haha

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[@abbyhinson7526]

Keep making videos man, you have saved my chem grade

[@FixItStory]

Just wanted to let you know. When doing total standard enthalpy change for a reaction, the final units are kJ not kJ/mol since you are multiplying by moles.

[@FixItStory]

This is really important because units are a tell tale sign of whether you’re doing the calculations right or not.

[@jondabron5496]

Thermodynamics quiz tomorrow, thanks.

[@zoe53209]

i have a quiz on this tmrrw and was struggling so much, but you helped me and have helped me all semester, thank you

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You teach better than the text. Soon, teachers and professors of chemistry will surely enough begin jumping onboard to your channel for quality lecture content, only for the teacher/professor to work out a few example practice questions on the board for the remainder of class

[@triple_gem_shining]

on last problem the Hf for 2H2O should be 572, not 576 :)

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Thank you so much! God bless you more sir! You are a big help to us students!

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Great Video! Saving me in my General Chemistry class in college

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Good luck to everyone else studying up the night before the chem ap

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What ab 40 minutes before the exam

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Hey brother just wanna say your teachings are amazing. God bless you mhen

[@gabedegoeij1190]

Thanks for the video, it really cleared up some confusion around the formula of ∆H. i'm still puzzeling with sensible Heat and Latent Heat. But this was a great start. Thank you

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Thank you so much for posting these videos free!

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Stop reading comments

[@nahfid2003]

The numerator denominator thing is a huge help since I cannot for the life of me do unitary method without feeling uncomfortable. Also ty for the amazing vid. Don't usually comment so take it for every one of your vids I watch.

[@astronickk_]

On your problem: CH4 + 2O2 -----> CO2 + H2O, the answer is -180. I think you miscalculated 2(-286) to be -576, instead of -572.

[@TheOrganicChemistryTutor]

At what time in the video did this occur?

[@astronickk_]

The Organic Chemistry Tutor it happened at 18:18

[@TheOrganicChemistryTutor]

Thanks for letting me know. I just made an annotation with the corrections.

[@astronickk_]

The Organic Chemistry Tutor You're welcome. I also like the videos, it helped me a lot. :)

[@aaron7323]

its actually -184

[@meli5681]

I have a question, why can I not just use q=m x delta H (54 g of ice times delta H?) Because you mentioned that we can do so when there is phase change?

[@quincyzhang299]

18:38, the enthalpy of the reaction should be -184 kJ/mol. The mistake occurred at -286 times 2, should equal to -572 instead of -576.

[@martinpagac7422]

Should be -180 kJ/mol

[@weareafteryou3975]

I noticed that as well, it’s not too big of a mistake though

[@kneelherbz9776]

18:38 I THINK 2(-286) IS -572 AND THE ANSWER SHOULD BE -180

[@velocity2516]

Paving my way to AIIMS delhi. Immensely motivated

[@cooltop1]

Awesome man! This is a great review of thermo helped me alot!

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God bless you fr... got my thermo exam tomorrow at UT.

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[@omidcrates439]

Why is there an inverse in the multiplication when solving from kj to moles to g

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if there were hundreds of subscribe buttons I would definitely subscribe them too. I cant tell how much these videos help. Your videos are gold. THANKYOU

[@MrKittke]

My hero , this will help me with my finals tomorrow so much

[@Comrade4213]

6:43 delta T should be the change of Temperature IN CELSIUS unless you gonna change the temperature's unit in the specific heat capacity from Celsius to Kelvin.

[@ENLIGHTENMENTING]

Thanks JG. You helped me so much with a doubt about the sign - of PV. Salutes.

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I can not attend my class during a day because of poor internet connection. Luckily, YT is saving me from failing😆

[@sahilsharma-yo8ty]

10/10 for the information but I would like to give quick feedback that the calculations in this video can be done more simply as i found your way of doing them a little complex andf confusing, but thanks a lot for teaching.

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I feel like your voice helps me understand this, idk i love it though THANK YOU for your help

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thought that it was my head playing tricks with me but jah, his voice does have a certain quality about it.

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I very much enjoy the way this man says the number 40

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I wished I watched this before I took my thermochem exam! Studying for the ap chem exam now.

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thanks a lot for the best explanation....clear and simple to understand

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Have a great day as well! Thank you

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I love this guy😭😭

[@abubakaryusuflela9731]

2 * 286 should be 572 not 576 note it, but we found your video so helpful keep it up.

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you're the best, man

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Am high ass hell learning math

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It's chemistry 😂

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sooo helpful! thanks so much, God bless you sir

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thank you organic chemistry tutor.

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Oh gosh this was soo helpful! Thank you so much!

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Thanks a lot man! This really helped me bro. Like it makes sense now. Bless!

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God bless you you actual lifesaver!

[@gabrielaguero4461]

On the last problem, aren’t you supposed to flip the equation the other way so that they can cancel, making the actual answer -800?

[@michaelaworona8201]

the desired equation in the question shows 2A + 2B on the reactants (left) side, and D + E on the products (right). therefore, he flips equation 2, which is has D + E on the reactants side and C on the products side. by flipping equation 2, we must flip the sign of the enthalpy of formation for that equation, which is given as -400 -- so it flips to +400. adding this enthalpy of formation value to the enthalpy of formation value for equation 1, which is also +400, yields a final answer of 800.

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yo im taking ap physics c next year u got any videos?

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Thank you for these videos

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hope my school recruits a teacher like you

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Thank you brother. Great video. 🤝

[@2based783]

Welp got a thermochemistry test in 30 minutes. Time to work some magic

[@rjfontenotiii]

I love how we squirrel on the simple math.

[@anathikelvinhem2421]

nice video lesson but i think your last example had a wrong answer it was supposed to be -180 not -184

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It took me 20 minutes of watching this to get what I’ve been trying to understand for 3 days. Just made a 80% on my test because of this video

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You are fantastic!! Thank you for this!

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Perfect as usual 👏🏻👍🏻

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I appreeciate the mental math lessons incorporated in this video lol

[@emmanuelquametwene4221]

How do u relate current,time and molecules in thermochemistry

[@rolalebleu8227]

the final value is incorrect! it is -180 KJ/mol

[@user-wj8rj8zm5f]

Thx it's extremely useful (TBH than school chem lol)

[@elliewineinger4036]

Wouldn’t the 1200 kg if heat energy be negative since it is being released from the reaction and it is on the right side of the reaction so it’s exothermic so wouldn’t it be -1200 kg grams?

[@parkeyya6986]

Goodluck on your exams!!!!