Substances that interact with water when heated.

Water reacts at room temperature:
with active metals (sodium, potassium, calcium, barium, etc.);
with halogens (fluorine, chlorine) and interhalogen compounds;
with salts formed by a weak acid and a weak base, causing their complete hydrolysis;
with anhydrides and acid halides of carboxylic and inorganic acids;
with active organometallic compounds (diethylzinc, Grignard reagents, methyl sodium, etc.);
with carbides, nitrides, phosphides, silicides, hydrides of active metals (calcium, sodium, lithium, etc.);
with many salts, forming hydrates;
with boranes, silanes;
with ketenes, carbon dioxide suboxide;
with fluorides of noble gases.

Water reacts when heated:
with iron, magnesium;
with coal, methane;
with some alkyl halides.

Iron and water interact with each other.

3Fe + 4H2O → Fe3O4 + 4H2 (t = 700-900 ° C).

Under normal conditions, iron practically does not react with water. Only hot iron can react with water vapor at a temperature of 700-900 ° C.

The reaction of iron and water takes place under the conditions: at a temperature of 700-900 ° C.

As a result of the reaction of iron and water, iron oxide (II, III) and hydrogen are formed. This reaction is historically the first way to produce hydrogen.

However, in the presence of oxygen or in humid air, iron slowly oxidizes.

2Fe + 2H2O + O2 → 2Fe (OH) 2.

The reaction of iron, water and oxygen takes place under normal conditions.

As a result of the reaction of iron, water and oxygen, iron (II) hydroxide is formed.

Magnesium reacts with water only when heated. As a result of this reaction, hydrogen is released.

Mg + 2H2O = Mg (OH) 2 + H2

Reaction of water and carbon

H2O + C → CO + H2 (t = over 1000 ° C).