Iron Rusting: Exo or Endo?  [ENDORSED]

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Jason Muljadi 2C
Posts: 62
Joined: Thu Jul 27, 2017 3:01 am

Iron Rusting: Exo or Endo?

Postby Jason Muljadi 2C » Fri Jan 26, 2018 9:42 am

Can someone explain to me why iron rusting is an exothermic reaction?

Jasmin Tran 1J
Posts: 54
Joined: Thu Jul 27, 2017 3:00 am

Re: Iron Rusting: Exo or Endo?

Postby Jasmin Tran 1J » Fri Jan 26, 2018 10:06 am

The process of rusting is a slow oxidation of Fe by oxygen, producing iron oxide by forming new bonds. The formation of bonds releases heat, making it an exothermic reaction.

Kelly Kiremidjian 1C
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Joined: Fri Sep 29, 2017 7:04 am

Re: Iron Rusting: Exo or Endo?

Postby Kelly Kiremidjian 1C » Fri Jan 26, 2018 10:09 am

I think iron rusting would be exothermic since it gives off heat

Erica Nagase 1H
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

Re: Iron Rusting: Exo or Endo?

Postby Erica Nagase 1H » Fri Jan 26, 2018 2:11 pm

Iron rusting is a reaction with oxygen to create iron oxide. Forming bonds is exothermic because it releases energy (vs breaking bonds, which is endothermic because it requires energy).

Mika Sonnleitner 1A
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Re: Iron Rusting: Exo or Endo?  [ENDORSED]

Postby Mika Sonnleitner 1A » Fri Jan 26, 2018 4:15 pm

Pure iron metal contains more energy than rusted iron. Therefore, energy would have to be released in order for iron to rust, creating an exothermic reaction. This same principle applies to other oxidation reactions. Since oxygen generally bonds with chemicals that have low-energy bonds, the oxygen bond is the higher energy bond, creating an exothermic reaction because heat must be released in order for the oxidation to occur.


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