Quote:
Originally Posted by dylang652
This is probably because as with all chemical reactions (well, I think it's all  ) they go faster as the temperature of the reactants goes up |
Well, not all chemical reactions go faster in a warm environment. There are 2 kinds of chemical reactions: exothermal and endothermal. The first give heat when the reaction takes places, the last ones need heat to take place.
It's got to do with energy: some reactions go to a lower energetic state, and therefor give away energy, mostly in the form of heat. But it can be electricity too; that's how a battery works! Other reactions go to a higher state of energy, and therefor need energy from an external (heat-)source.
Just my 2P of wisdom.
As for the oxidation of brakedisks: I think oxidation of iron goes faster when applied heat, but I'm not to sure. (I'm an electronics engineer, not chemistry.)
K.