How to distinguish reduced iron powder and atomized iron powder

The difference between reduced iron powder and atomized iron powder by appearance and by physical and chemical means.

1 Atomized iron particles are smaller, and reduced iron particles are slightly larger. 

2 The purity will be marked, depending on which type of iron powder you buy. 

3 is iron powder. If the reaction is complete, it will generate the same heat, but the atomized iron particles are smaller, so it is easier to react completely.

If it's distilled water, it doesn't, but if it's not pure, there's an electrochemical reaction, and the heat is negligible, and of course if you have an electrolyte solution, you can release a lot of heat in a short period of time, in theory up to about 60℃.