Enthalpy of Halogen Breakdown

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John_Richey_4A
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Joined: Fri Sep 28, 2018 12:27 am

Enthalpy of Halogen Breakdown

Postby John_Richey_4A » Sat Jan 19, 2019 6:13 pm

Is delta H positive or negative in the breakdown of halogens like F2 into 2F?

Alyssa Wilson 2A
Posts: 65
Joined: Fri Sep 28, 2018 12:18 am

Re: Enthalpy of Halogen Breakdown

Postby Alyssa Wilson 2A » Sat Jan 19, 2019 6:31 pm

Delta H is the change in enthalpy and if delta H is greater than zero, this means that a system absorbed heat and is known as an endothermic reaction. When delta H is less than zero, this means that a system released heat and the change in enthalpy had a much larger initial enthalpy value than the final one. This is called an exothermic reaction. In the breakdown of halogens, delta H would remain positive because of the large distance between the bonding pairs of the nuclei in the halogens. Each halogen will feel a net pull of +7 from each end of the bond.


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