Bond Enthalpies

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madisondesilva1c
Posts: 91
Joined: Fri Sep 28, 2018 12:16 am

Bond Enthalpies

Postby madisondesilva1c » Mon Feb 04, 2019 10:10 am

When figuring out what bonds to break to then reform, is it necessary to draw out the lewis structures? Are we expected to remember and draw out lewis structures in the way that we did in 14A?

005115864
Posts: 64
Joined: Fri Sep 28, 2018 12:15 am

Re: Bond Enthalpies

Postby 005115864 » Mon Feb 04, 2019 11:18 am

It's not necessary, but it is certainly helpful to apply what you already know how to do. For instance, I like to draw them out because I like to see what is similar and what is different and compare the molecules I'm looking at. That way, I don't have to count every single bond in the reaction, just what is different and subtract that and it saves me time. It's also good to visually see what's going on, but it is all about preference.

chaggard
Posts: 37
Joined: Fri Sep 28, 2018 12:19 am

Re: Bond Enthalpies

Postby chaggard » Tue Feb 05, 2019 9:15 pm

No it is not necessary, it is completely personal preference. The questions involving bond enthalpies will most likely not be complicated molecules, so the lewis structures will be relatively easy to get.

varunhariharan
Posts: 30
Joined: Mon Jan 07, 2019 8:16 am

Re: Bond Enthalpies

Postby varunhariharan » Fri Feb 08, 2019 9:22 am

Drawing the Lewis structures of larger molecules can make the calculation much easier in the long run, so I think getting into the habit of drawing them out to get a better visualization of the bond enthalpies makes sense.


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