H2O is the compound water. Forming it from other things would be a chemical change. Using it to react with other substances and form new substances would also be a chemical change. But water just sitting there is not a chemical change.
EX: hydrogen(gas) + oxygen(gas) forms water (chemical change)
Water + sodium forms sodium hydroxide and hydrogen (gas) (chemical change)
BUT water + sugar makes a sugar water solution (not a chemical change) nothing new was made, the sugar just dissolved and the water is still water
The chemical formula H2O represents water. It is a chemical formula that describes the composition of a substance, in this case, water. Therefore, it is related to a chemical change rather than a physical change.
A chemical change (as opposed to a physical change) is when the actual chemical makeup of a substance changes. For example, Na+Cl->NaCl. A physical change on the other hand would be more along the lines of H2O(s)->H2O(l), (melting ice).
The chemical name for water is dihydrogen monoxide, with the chemical formula H2O.
The change of water to steam is a physical change, not a chemical change. In this case, the water molecules are simply gaining enough energy to break free from their liquid state and form a gas. No new substances are formed in this process.
Ice melting is a physical change rather than a chemical change because the substance (water) remains the same at a molecular level. The process involves a change in state from solid to liquid due to the absorption of heat energy, with no alteration to the chemical composition of the material.
Freezing of H2O is a Physical Change.
It isn't. The melting of ice is a phase change, which is a physical change because the chemical composition of the water does not change.
The chemical formula H2O represents water. It is a chemical formula that describes the composition of a substance, in this case, water. Therefore, it is related to a chemical change rather than a physical change.
Physical. H2O is still H2O.
Water is a chemical compound (H2O) not a "change".
It constituen carbon and hydrogen converted into CO2 and H2O. It is the chemical change of candle
physical because water is H2O and ice is H2O also
Physical, it is still H2O
No it is not. The chemical composition is H2O before and after freezing.
Burning coal is a chemical reaction, a chemical change; but the solid reactant is transformed in gaseous products (H2O and CO2) - this is a physical change.
No. It is a physical change. The chemical formula for water is H2O, and that is also the chemical formula for ice. So there is no chemical change taking place, only a change in the state of matter.
H2co3=co2+h2o