Hess's Law Trick Question You Should Know
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- Опубліковано 7 тра 2018
- This Hess's Law question has tricked so many students on exams, but you won’t be one of them! In this video, you will understand how to use fractions and Hess's law together and how everything affects your change in enthalpy. This is also a potential extra credit question, hint hint!
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I love that you take the time to create quality educational content with a creative twist!
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OMG, I have a chemistry final tomorrow so any kind of help is appreciated. Thanks!
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First video I've watched of you and what my teacher couldn't explain in 3 classes, you explained in 1 video! such a creative and easy way to solve them, tysm!
Super helpful, thank you!
I literally was just doing this question on my homework a minute ago.
👍👍👍 Thanks So much Dii
Your videos help me do excellent on exams. Thanks!!
Probably the most succinct Hess's law video (pertaining to this type of question) out there. Gracias.
De nada 😊So glad you really liked the video!
Very helpful thanks alot
Thank you!
I couldn't understand this for the first time i saw the video but still i love the way you teach
This really bothered me until I substituted a letter for each molecule. The subscripts must have overwhelmed me where I couldn’t figure out the math for problem.
god, this is just so useful, thank u so much
Thanks madam 🎉🎉 you have really helped me
love the color of this video! of course it was really helpful!
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Thank you so much I owe you my soul
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Thanks Miss ❤️🙏
Life saver🤧💕
why some time i need to do the combustion to find the enthalpy of formation, while this video need to do like above? to find the total enthalpy change
Tomorrow is my final and you just saved my life, thank you
Hope your final went well!
Thank you!!!!!
You’re welcome Mark!
Mam last equation i.e 3 will be multiply by -1/2 the heat chenge please check
Thank u so much 💜💜
You're very welcome 💕
I LOVE Y.....
YOUR TEACHING STYLE...
MY GAAD..
I don't know when to use H products- H reactants and energy to break bonds - energy to make bonds. Please help
Mam u r very useful.
What would you do with the 1/2 H2 on the reactants side in 2:45? I know you added the h2s on the products side but isn't there a remaining H2 on the reactants that must cancel out?
Opposite sides subtract so I would add the 3/2 H2 and 2 H2 together to get 3 1/2 H2 and then subtract the 1/2 H2 that was on the reactants side and this gives us the 3 H2 on the final answer.
This is nice Melissa. It is difficult to show in 2-D how to flip, double, and halve a reaction.
Thank you!
I can’t get all my terms to cancel and I can’t reach the goal in a problem in my book. What do I do?
Or you can divide the first and third equations by 2 and you'll get the enthalpy of formation of NH3, CH4 and HCN.
Then you can use ΔΗ= Σ ΔΗf(products) - Σ ΔΗf(reactants), anyway great explanation and video!
i m from India....i love yr videos mam
Thanks mam.👍👍❤
thankz
Extremely helpful! The only thing I am stuck on is, if anyone has a recommendation, when we are not given the equations that will give us our goal equation... Do I just try to come up with ones??
Hey Britt, was there a specific question you were thinking of? You can also DM or tweet me the question @hellomelissam if that makes it easier.
Mygod! You're amazing.
Why did you place the H2 on the product side and not the reactant side.
super mam before my exam you taught very easy and convable method to my brain love you mam #indian
thanks Madam
Hi maam. I dont know why theres parenthesis g and s. I dont know what dat means
In 1:35 H2 is on the reactants for the last equation, why didn't you flip? (also tysm for this video!)
Why you did not mutiply½ to delta h 45.9?
Hello ,
Mam your big fan .....
Best of luck
sooooo aesthetic
I Seen this video for neet exam in India 👍liked it
Can you tell me to which grade student you teach this concept in your country?
You are very aesthetic.nice!
i need to pay you notebook the dot one where can i found it
i can't figure out how you added the reactant and products:/
1:45 add everything on the left side of the arrow for the reactants
add everything on the right side of the arrow for the products
combine them to get the overall reaction
Love from KASHMIR
ive been looking at different questions in which two elements in all four equations are the same, but when it comes to changing up the equations only one is required to change since we don't manipulate them if the element is in all equations. when I look at the answers to my homework though they show that the heat has changed for two equations not just one. I think i'm getting lost when it comes to having the same elements in all of the equations.
Hey Laura, feel free to tweet me the exact question and I am happy to explain it on my Live show this Sunday at 12PM Pacific Time. You can tweet me at @hellomelissam and use the hashtag #askmelissamaribel
my exam is Friday ! :((@@melissamaribel
Ok no worries, DM then on Instagram @hellomelissam it just helps to see the question.
I just did .. thanks so much@@melissamaribel
Hesses law is so amazing! From Hasnain Abbas Naqvi,Rubab Hasan’s son.
Thanks mom....
Could you by any chance teach me how to balance combustion chemical equations?
Melissa Maribel thank you so much 😊
What If the constituent equations are not given... How do I form the equations? Plz help me out
Do you have a specific question you are thinking of?
@@melissamaribel yeah.. Like calculate delta hf for benzene or methane. And the values for each element is also given.. But the equations are not given in the question. We have figure it out. Help me out with that plz
For my exams I am not given the constituent equations either
I am rutuja thanks mam ur best n perfect 🙂👍😀
Ok, but how does food become joules?
if you multiply 1/2 from 2HCN wouldn't that be 1HCN
Not bad
Lab u po finally maka S sleep na ko🫡
Thank you, i am writing Chemistry in 2 hours time. (x)
You're so welcome 🤓
Oml it makes sense
how is this a trick question
There’s no trick to this trick question tho??? It’s literally straightforward hess with simple manipulation of the given equations