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.

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

Watching him doing big calculations w/o a calculator meanwhile I can barely do something like 56-24 in my head.😅

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

I didn't come here to watch you test you mental math skills. use a calculator and trim the video down.

Honestly I'm so thankful for your videos. Definitely helps soo much!

I love you so much

You are fantastic

God bless you man☆

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I now see why they call me mans mark walhberg

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.

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

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

Highly appreciated,thanks

2(-286) =-572 😆

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Thank you so much for all the videos

I love what you’re doing great stuff man

On the next video please use a calculator so that our data and time will be saved, and that will avoid doing mistakes,

but thanks for your vid, it really helped

can teachers please just put this on the board for lecture. Holy shit youre so much more clear than these stupid clueless teachers.

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

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

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

i dont't know it is mathematics 1st class or chemistry 11class