Dissociation Energy

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704629866
Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Dissociation Energy

Postby 704629866 » Sat Oct 31, 2015 1:16 pm

How do you determine dissociation energy?

Sandeep Gurram 2E
Posts: 42
Joined: Fri Sep 25, 2015 3:00 am

Re: Dissociation Energy

Postby Sandeep Gurram 2E » Sat Oct 31, 2015 7:01 pm

It isn't something we have to calculate, at least for this class. However, there are general rules for which bonds between atoms might be stronger than other bonds. Normally, shorter bonds are stronger than longer bonds (i.e. triple > double > single).

Additionally, bonds between atoms that have lone pair - lone pair repulsion can result in weakening of the bond. For example F2 has a very low dissociation energy as there are three lone pairs on each F atom that contribute to this repulsion that result in the weakening of the bond.

Lastly, size of an atom can affect its strength. NaF would be stronger than NaI as fluorine has a smaller atomic radius and therefore can form a stronger bond with sodium.

Prina Patel 1H
Posts: 62
Joined: Fri Sep 25, 2015 3:00 am

Re: Dissociation Energy

Postby Prina Patel 1H » Wed Nov 04, 2015 10:13 pm

I am not sure what the specific equation is but it generally trends on the periodic table by increasing at you go up and to the right of the periodic table.


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