8.3 Bond Enthalpy | Calculating Delta H | General Chemistry
Chad provides a lesson on how to use Bond Enthalpies to calculate Delta H for a reaction. Having already learned Hess's Law and using Enthalpies of Formation to Calculate Delta H, a third method for calculating a good approximate value for Delta H is presented here. It is contrasted specifically with using Enthalpies of Formation which involves taking the sum of the Produces minus Reactants as with Bond Enthalpies we take the sum of the Reactants minus Products. Trends in Bond Enthalpies involving multiple bonds, size, and electronegativity are presented as well as two example calculations of Delta H from Bond Enthalpies.
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00:00 Lesson Introduction
00:53 Using Bond Enthalpy to Calculate Delta H
04:50 Calculating Delta H Example #1
11:20 Trends in Bond Enthalpy
13:32 Calculating Delta H Example #2
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Пікірлер: 28
Seriously, these videos are saving my life! Thank you so so much for the time you've spent helping us all learn chemistry! 😊🙌🏻
@ChadsPrep
Жыл бұрын
You're welcome and Thank You!
Powerful Video! Three different ways to calculate enthalpy !
@ChadsPrep
Жыл бұрын
Glad you found it helpful, Jon - Happy Studying!
AHA! This is what I was looking for. I was confusing enthalpies of formations with average bond enthalpies. Thank you very much! Also looking forward to checking out all your organic chemistry vids on your website. In the orgo class I'm taking, we're mostly left to teach ourselves, so these will be immensely helpful :-)
@ChadsPrep
2 жыл бұрын
Great to hear that you're finding the videos helpful Suzanne :)
Thank you soo much for helping us learn these specific way of learning enthalpy these past videos😊
@ChadsPrep
5 ай бұрын
You're very welcome!
Amazing lesson. Thank you. Do you have videos for Introductory Biology and/or Biochemistry anywhere, please? Do you plan on making them?
@ChadsPrep
6 ай бұрын
I don't currently have one on youtube but I have a free biochemistry playlist here: www.chadsprep.com/chads-elementary-biochemistry-videos/
Thankyou for more understanding
@ChadsPrep
4 ай бұрын
You're welcome
Hi in 2H2+O2---->2H2O Is the delta bond enthalpy different than the delta heat of formation?
thank you for clarifying when to use bonds broken - bonds formed vs products - reactants! Hoping just the table given of Delta hf or Bond enthalpy value will be clear!
@ChadsPrep
2 жыл бұрын
It will be clear. The difficulty comes when students don't realize that they should be looking for which of the two are actually given...big source of confusion but I think you got it!
@devikanair44
2 жыл бұрын
@@ChadsPrep you're the best thank you!!
@ChadsPrep
2 жыл бұрын
@@devikanair44 you're so welcome :)
Thank you so match ❤❤
@ChadsPrep
Жыл бұрын
You are very welcome.
life saver !!!!
@ChadsPrep
8 ай бұрын
Excellent!
You are a lifesaver! Thank you so much! P.S. Love the shirt :-)
@ChadsPrep
Жыл бұрын
You're welcome and Thank you!
Since H bonds are weaker than covalent bonds Shouldnt the enthslpy between O-H be noticeably different from O=O?
Sir is enthalpy of formation always exothermic because it is the enthalpy of formation reaction
@ChadsPrep
4 ай бұрын
Most enthalpy of formation will be negative (exothermic) with a few exceptions, for example NO
Can confirm that students do sometimes forget they have learned 3 distinct ways to calculate Delta H 🤣
@ChadsPrep
6 ай бұрын
Yes Indeed!!!