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Dissociation Energy

Posted: Sun Nov 10, 2019 3:40 am
by Eileen Si 1G
Why are dissociation energies always positive? Is energy released or gained when a bond is broken?

Re: Dissociation Energy

Posted: Sun Nov 10, 2019 3:54 am
by Amanda Lin 2I
Dissociation energies are always positive because energy is absorbed in order to break the bond.

Re: Dissociation Energy

Posted: Sun Nov 10, 2019 9:44 am
by Isabella Dal Porto 1H
Forming bonds release energy and breaking bonds require energy.

Re: Dissociation Energy

Posted: Sun Nov 10, 2019 8:46 pm
by Daniel Chen 2L
If breaking a bond requires energy then is energy gained to break the bond and the energy is released when the bond is broken???

Re: Dissociation Energy

Posted: Sun Nov 10, 2019 10:54 pm
by Eesha Sohail 1D
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.

Re: Dissociation Energy

Posted: Sun Nov 10, 2019 11:00 pm
by Jacob Villar 2C
Energy is absorbed to be able to break bonds.

Re: Dissociation Energy

Posted: Tue Nov 12, 2019 8:38 pm
by Ying Yan 1F
^ 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.

Re: Dissociation Energy

Posted: Tue Nov 12, 2019 9:07 pm
by ramiro_romero
Dissociation energy is always positive because energy is always absorbed for dissociation. To break a bond requires an additional absorption of energy

Re: Dissociation Energy

Posted: Sat Nov 16, 2019 4:19 pm
by Siddiq 1E
How can we calculate dissociation energy? Will we need to?

Re: Dissociation Energy

Posted: Sat Nov 16, 2019 4:22 pm
by Sally Qiu 2E
dissociation energy is the energy required to break a bond, and since breaking bonds requires energy, the dissociation energy will be positive