I should get a larger conversion of oxide to iron if I just keep the oxide longer in the gas stream. [...] As for the temperature, I doubt if I can go
much higher in my glass test tube, because the glass will melt.
[...]
Does any iron surface (no matter how large or small the piece) oxidize on the surface when in contact with air, at room temperature? I mean, without
water, the usual condition for the formation of rust. And if so, then is the pyrophoresis (if that's the right word) of the small grains simply due
to the large surface area, hence the large heat production per unit mass? |