Physical and Chemical Changes. A physical change is any change NOT involving a change in the substance’s chemical identity. There is no effect on the chemical identity of the substance. For example, water remains water, no matter if it solid, liquid or gas.Click to see full answer. Regarding this, is h2o a physical or chemical change?Water can also undergo a chemical change. Water molecules can be broken down into hydrogen and oxygen molecules by a chemical reaction called electrolysis. When an electric current is passed through liquid water (H2O), it changes the water into two gases—hydrogen and oxygen.Secondly, is changing state of matter chemical or physical? Changes of state are physical changes in matter. They are reversible changes that do not change matter’s chemical makeup or chemical properties. Processes involved in changes of state include melting, freezing, sublimation, deposition, condensation, and evaporation. Then, is freezing water a chemical change or physical change? Freezing water is NOT a chemical change. It is a physical one. Water molecules remain as water molecules, still two hydrogen atoms and one oxygen atom. So there is no chemical changes taking place.Is boiling water a physical change?Boiling waterBoiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). If the bubbles were caused by the decomposition of a molecule into a gas (such as H2O →H2 and O2), then boiling would be a chemical change.
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