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Bond Length

Posted: Sun Nov 17, 2019 4:16 pm
by Viviana Velasquez
How do we determine bond lengths?

Re: Bond Length

Posted: Sun Nov 17, 2019 4:21 pm
by chemboi
They are experimentally determined.

Re: Bond Length

Posted: Sun Nov 17, 2019 7:49 pm
by Dan M -3E
We don't determine bond lengths ourselves, we are given the lengths because they have been experimentally found from repeated experiments of different molecules involving the same atom.

Re: Bond Length

Posted: Sun Nov 17, 2019 7:51 pm
by Anna Chen 1K
Bond length is determined by the bond order, or the number of bonded electrons. This has to be derived from experiments.

Re: Bond Length

Posted: Sun Nov 17, 2019 7:56 pm
by Jasmine Summers 4G
As mentioned, it is determined experimentally. We just need to know that double bonds are stronger and shorter than single bonds.

Re: Bond Length

Posted: Sun Nov 17, 2019 8:05 pm
by 205154661_Dis2J
The bond length is determined experimentally, so we do not determine the bond lengths ourselves.

Re: Bond Length

Posted: Tue Nov 26, 2019 11:35 am
by Merin Padayatty 3G
The exact bond length is derived from experiments, but relative bond lengths can be determined from bond order.

Re: Bond Length

Posted: Tue Nov 26, 2019 5:56 pm
by annikaying
You have to be given the actual bond length from previous experiments but there are general guidelines such as double bonds being shorter than single bonds.

Re: Bond Length

Posted: Tue Nov 26, 2019 6:11 pm
by Bita Ghanei 1F
single bonds are longest and weakest, triple bonds are shortest and strongest

Re: Bond Length

Posted: Tue Nov 26, 2019 9:11 pm
by Megan Jung 3A
bond lengths are determined experimentally. However, we can compare the bond lengths of different compounds through periodic trends and atomic radii.

Re: Bond Length

Posted: Wed Nov 27, 2019 5:36 pm
by Natalie Nartz 4F
We don't actually have to calculate bond length quantitatively. Just remember single bonds are longer than double and triple bonds

Re: Bond Length

Posted: Tue Oct 06, 2020 10:25 pm
by lwon Dis2I
I have not learned anything about Angstroms and cannot find a lot about it online. Can someone walk me through how to solve the problem below?

All of the organic compounds contain C and H as their essential elements, the bond length of C-H is 110 pm. Express the C-H bond length in Angstrom.

Re: Bond Length

Posted: Wed Oct 07, 2020 9:48 am
by David Chibukhchian 2G
lwong Dis1L wrote:I have not learned anything about Angstroms and cannot find a lot about it online. Can someone walk me through how to solve the problem below?

All of the organic compounds contain C and H as their essential elements, the bond length of C-H is 110 pm. Express the C-H bond length in Angstrom.


Basically, one Ansgtrom is equal to 10^-10 meters. You can use that as a reference in this situation to help you find your answer. 110 pm is the same as 110 x 10^-12 m. If you plug that into your calculator, you can see that you get 1.1 x 10^-10 meters. Thus, this means there are 1.1 Angstroms in the C-H bond length if one Angstrom is 10^-10 meters. I hope that makes sense!!

Re: Bond Length

Posted: Wed Oct 07, 2020 10:22 am
by Jessica Katz
bond length can be done experimentally, but it can be estimated by doing a lewis structure of the molecule and see whether it is a triple, double, or single bond because that will tell you its relative length compared to the other bonds in the molecule. Triple bond is the shortest while single bond is the longest and weakest.

Re: Bond Length

Posted: Thu Oct 08, 2020 12:42 am
by Kelly Yun 2I
So would that mean that breaking a triple bond would release the most amount of energy?

Re: Bond Length

Posted: Thu Oct 08, 2020 1:20 am
by Kiyoka Kim 3C
Yes. Because triple bonds are the strongest, they require more energy compared to single and double bonds to break.

Re: Bond Length

Posted: Tue Nov 03, 2020 5:47 pm
by Inderpal Singh 2L
Triple bonds are the strongest bond so they would indeed require more energy than single and double bonds to break.

Re: Bond Length

Posted: Thu Nov 05, 2020 11:17 am
by Taber Ball 1F
Hi! So bond length and bond strength are inversely related meaning that as the bond length increases, its strength decreases and vise-versa. I found this website which compares different examples of bonds (single, double triple) and their lengths and energy (see table 9.4). Hope you guys find this helpful!

https://openstax.org/books/chemistry-at ... lent-bonds

Re: Bond Length

Posted: Fri Nov 06, 2020 10:48 pm
by DominicMalilay 1F
x-ray diffraction is used to determine the bond length.

Re: Bond Length

Posted: Sun Nov 08, 2020 5:26 pm
by DavidTabib 3H
They are experimentally found so we don't need to find it ourselves.

Re: Bond Length

Posted: Sun Nov 08, 2020 11:02 pm
by Muskaan Abdul-Sattar
They are found experimentally!

Re: Bond Length

Posted: Sun Nov 08, 2020 11:09 pm
by LovepreetSran_3H
Bond lengths are experimentally determined.

Re: Bond Length

Posted: Mon Nov 09, 2020 11:47 am
by FionaHunter21
So shorter bond lengths have higher energies right? Since they are stronger the energy of the bond is more negative, but is it still considered higher energy?