oxygen combines with hydrogen to form water. Is this process due to physical or chemical properties....?

Question

..continued...of oxygen and hydrogen.


explain.
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please please.

Answer 1

Mix salt and water together. The salt disolves and the resultant material is a clear liquid. Boil the mixture and the water boils off (you can collect this) and the salt is left in the container. This was a PHYSICAL change that produced a MIXTURE. Separation can be done by PHYSICAL means. Iron filings and sulpher powder when mixed can be separated using a magnet - another physical mixture.

When Oxygen and hydrogen are mixed in a bottle NOTHING happens and you still have a mixture. Put a spark into the mixture and you have an exothermic reaction, ie heat is given off. A liquid is formed. NO PHYSICAL method can be used to separate the new substance, a CHEMICAL change has occured and a new compound has been formed.

Answer 2

Water splitting is the general term for a chemical reaction in which water is converted into oxygen and hydrogen. This process in plants takes place in the oxygen-evolving complex (OEC), of Photosystem II. Water splitting is actively researched because demand for cheap hydrogen is expected to rise with the new hydrogen economy.

Current water splitting methods include

electrolysis
thermolysis at 2500°C or above.


In Short Chemical. Pure hydrogen forms water when burned. Burning is oxidation which is chemical.

Answer 3

Chemical because it's irreversible. Physical is reversible.

Answer 4

I don't know but I appreciate person before me answering that he knows it's chemical. I wonder is there a way to know / test to give to determine that?

Answer 5

Chemical.

Physical changes change the state of the matter, such as water to ice.

Chemical changes are when smell, color, or make-up of molecule changes

*hope that helped a little