Dissociation Energy

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Eileen Si 1G
Posts: 120
Joined: Fri Aug 30, 2019 12:17 am

Dissociation Energy

Postby Eileen Si 1G » Sun Nov 10, 2019 3:40 am

Why are dissociation energies always positive? Is energy released or gained when a bond is broken?

Amanda Lin 2I
Posts: 101
Joined: Sat Aug 17, 2019 12:15 am

Re: Dissociation Energy

Postby Amanda Lin 2I » Sun Nov 10, 2019 3:54 am

Dissociation energies are always positive because energy is absorbed in order to break the bond.

Isabella Dal Porto 1H
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

Re: Dissociation Energy

Postby Isabella Dal Porto 1H » Sun Nov 10, 2019 9:44 am

Forming bonds release energy and breaking bonds require energy.

Daniel Chen 2L
Posts: 101
Joined: Fri Aug 30, 2019 12:15 am

Re: Dissociation Energy

Postby Daniel Chen 2L » Sun Nov 10, 2019 8:46 pm

If breaking a bond requires energy then is energy gained to break the bond and the energy is released when the bond is broken???

Eesha Sohail 1D
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

Re: Dissociation Energy

Postby Eesha Sohail 1D » Sun Nov 10, 2019 10:54 pm

I think it helps to think of energy as power to do something, rather than something tangible. It takes energy to break a bond, but energy is released when a bond is formed. That's because a bonded state is typically less energetic or "powerful" than an unbonded one, and therefore more stable. Matter is always looking for that stability. So, to break a bond means going against that natural attempt to gain stability, therefore requiring energy from outside.

Jacob Villar 2C
Posts: 105
Joined: Sat Aug 17, 2019 12:18 am

Re: Dissociation Energy

Postby Jacob Villar 2C » Sun Nov 10, 2019 11:00 pm

Energy is absorbed to be able to break bonds.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: Dissociation Energy

Postby Ying Yan 1F » Tue Nov 12, 2019 8:38 pm

^ Dissociation energy is positive because energy is need to break the bond. On the other hand, when bonds are formed, energy is release and that value of energy is negative.

ramiro_romero
Posts: 90
Joined: Sat Sep 07, 2019 12:16 am

Re: Dissociation Energy

Postby ramiro_romero » Tue Nov 12, 2019 9:07 pm

Dissociation energy is always positive because energy is always absorbed for dissociation. To break a bond requires an additional absorption of energy

Siddiq 1E
Posts: 106
Joined: Fri Aug 09, 2019 12:15 am

Re: Dissociation Energy

Postby Siddiq 1E » Sat Nov 16, 2019 4:19 pm

How can we calculate dissociation energy? Will we need to?

Sally Qiu 2E
Posts: 105
Joined: Fri Aug 30, 2019 12:18 am

Re: Dissociation Energy

Postby Sally Qiu 2E » Sat Nov 16, 2019 4:22 pm

dissociation energy is the energy required to break a bond, and since breaking bonds requires energy, the dissociation energy will be positive


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