Bond enthalpies

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Carlos Gonzales 1H
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Bond enthalpies

Postby Carlos Gonzales 1H » Sun Jan 21, 2018 11:10 pm

In a test if we are asked to solve for the enthalpy of a reaction will we be given a chart with the enthalpies for the different bonds?

Yiwei Zhou 2I
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Joined: Fri Sep 29, 2017 7:07 am

Re: Bond enthalpies

Postby Yiwei Zhou 2I » Sun Jan 21, 2018 11:14 pm

I think we would be given certain bond enthalpies value instead of a whole chart

Posts: 52
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Re: Bond enthalpies

Postby AnuPanneerselvam1H » Sun Jan 21, 2018 11:31 pm

We will be given bond enthalpies and we will have to determine reaction enthalpy depending on which bonds are broken and which bonds are formed.

Nate O 2L
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Re: Bond enthalpies

Postby Nate O 2L » Mon Jan 22, 2018 12:37 am

Are these enthalpies Okay to use because I think Dr. Lavelle said that they were the most innacurate

Priyanka Bhakta 1L
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Re: Bond enthalpies

Postby Priyanka Bhakta 1L » Mon Jan 22, 2018 9:33 am

If the bond enthalpies are given and/or the question asks for us to calculate the reaction enthalpy by using the given table/values, I would use them and solve the problem that way. I think Dr. Lavelle told us that bond enthalpies are the least accurate way just as a note and maybe for conceptual questions, but we should just use whatever is given to us to solve the problems.

Another key thing to remember is that to find the reaction enthalpy by bond enthalpies, deltaHrxn = sum(enthalpies bonds broken) - sum(enthalpies bonds formed).

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