Hess's Law Problems & Enthalpy Change - Chemistry
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- เผยแพร่เมื่อ 26 ก.ย. 2024
- This chemistry video tutorial explains how to solve common hess's law problems. It discusses how to calculate the enthalpy change of a reaction using hess's law.
First Law of Thermodynamics: • First Law of Thermodyn...
Thermochemistry Equations:
• Thermochemistry Equati...
Internal Energy, Heat, and Work:
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Thermochemical Equations:
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Specific Vs Molar Heat Capacity:
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Coffee Cup Calorimeter:
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Specific Heat Capacity Problems:
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Hess Law Problems:
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More Hess Law Problems:
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Enthalpy of Formation & Heat Combustion:
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Enthalpy Practice Problems:
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Speed of Light, Frequency, & Wavelength:
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Because the "professors" only care about research. Also, they make it hard on purpose because there aren't enough faculty for the amount of students wanting to study STEM at the upper division level.
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holy shit when all the O2's ended up cancelling at the end with all those fractions my mind was blown man
It's fun when you're thinking " oh god, I hope this all works" When you're going through Hess's law, and then somehow it all cancels out correctly, even though you were certain you did something wrong.
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i have been studying for an upcoming thermodynamics exam and was very stumped when it came to hess's law. my professor is amazing but i am autistic and sometimes i need things explained to me in a very particular way that many do not have time for(no skipped steps, nothing vague or else i get stuck on how to approach problems rather than solve them) and this video remedied the issue. i am so glad i was recommended this channel. i have an affinity for math and science so i will definitely be sticking around.
12:53 for anyone that is confused when he started to cancel out the equations, he was supposed to write NO2 rather than 02 in the final reaction, as you can see he circled it but i think mistakenly wrote 02 instead
due to the limitation of the human intellect a miscalculation could be recorded.
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my chem professor gave me one example of this in our notes, and explained it so poorly that I just thought maybe I was stupid for not understanding. Learning literally three hours before my exam it's incredibly simple. tsym
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What do you mean? Please explain, I have seen many say that in the comments but I don't understand :(
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Professor Organic Chemistry Tutor, thank you for a solid analysis of Hess Law and Enthalpy Change in General/Old Fashion Chemistry. I found this video somewhat confusing, however, I will review this material from start to finish. Professor Organic Chemistry Tutor, thanks to the viewers for finding and correcting the error(s) in this video.
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8:25 The answer is -535.5 kJ. Not a big deal but I just wanted to point out that you put -533.5 kJ
It's -533.5kJ
@@PagurayanMaNica 8:26 answer should be -38.5 because it's +247.5kJ, he didn't flip the second equation.
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Calculate the enthalpy for the reaction between cupper matte(Cu2S) and oxygen.
2Cu+02→ 2 Cuo △H°=-155 kj/mol
Cu+S → CuS △H°=-53.1 kj/mol
S+02 → S02 △H^=-297 kj/mol
4CuS+2Cu0 →3Cu2S+502 △H=-13.1kj/mol
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1.Common ones : you leave them
2.Reverse reactions: sign changes
3. Multiplying affects everything
Missed to add NO2 to the last reaction on the product side, but we know you covered that part in the video 😊
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