Bond Enthalpies

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Priscilla Tamborini 1B
Posts: 9
Joined: Wed Nov 18, 2015 3:00 am

Bond Enthalpies

Postby Priscilla Tamborini 1B » Mon Jan 30, 2017 12:02 am

How do you explain the difference between bond enthalpies in NO and NO2?

Ashley_Thomas_3C
Posts: 20
Joined: Wed Sep 21, 2016 2:56 pm

Re: Bond Enthalpies

Postby Ashley_Thomas_3C » Mon Jan 30, 2017 10:17 am

NO has a double bond while in NO2 the bonds are equivalent due to resonance. The lewis structures for NO and for NO2 show that the bond order in NO is the double bond and that in NO2 it is about the average of a N-O and N=O.

Patrick Ricaflanca 2H
Posts: 21
Joined: Sat Jul 09, 2016 3:00 am

Re: Bond Enthalpies

Postby Patrick Ricaflanca 2H » Wed Feb 01, 2017 9:08 pm

Also, I think it would require more energy to break the double bond than it would be to break the single bond (if you want to say something in terms of energy).

Kaitlin_Ryan_ 3K
Posts: 28
Joined: Fri Jul 15, 2016 3:00 am

Re: Bond Enthalpies

Postby Kaitlin_Ryan_ 3K » Sat Feb 04, 2017 3:10 pm

Why do more complex molecules have higher bold enthalpies than simpler molecules?

Ashley_Thomas_3C
Posts: 20
Joined: Wed Sep 21, 2016 2:56 pm

Re: Bond Enthalpies

Postby Ashley_Thomas_3C » Sun Feb 05, 2017 10:43 pm

Entropies of large, complicated molecules are greater than those of smaller, simpler molecules because large, complicated molecules have more disorder as there are a greater number of ways they can move around in 3D space.

204863791
Posts: 9
Joined: Fri Jun 17, 2016 11:28 am

Re: Bond Enthalpies

Postby 204863791 » Sun Feb 05, 2017 11:41 pm

What is the difference between reaction enthalpy and standard formation enthalpy? How can we tell the difference in a reaction?

Drake_Everlove_1K
Posts: 19
Joined: Sat Sep 24, 2016 3:02 am

Re: Bond Enthalpies

Postby Drake_Everlove_1K » Sun Feb 26, 2017 2:58 pm

Reaction enthalpy describes the total net change in enthalpy that occurs after the reactants change and form products. Standard formation enthalpies describe the enthalpy required to create a given molecule from its atoms

Yeyang Zu 2J
Posts: 58
Joined: Fri Sep 29, 2017 7:06 am

Re: Bond Enthalpies

Postby Yeyang Zu 2J » Mon Jan 15, 2018 9:33 am

NO HAS A DOUNVLE BOND
BUT NO2 HAS A resonnance structure, which means the strenth of the bond is between double bond and single bond
Therefore, NO has higher bond enthalpy


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