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When does physical chang happen?

a physical change happens when something is changed physically, for example, snapping a twig or popping a balloon is physical change, but actions like burning wood or cooking an egg are not physical.


If an ice cube is placed in a pot that is heated what will happen after it has melted is it a chemical or physical change?

When ice melts and becomes a liquid it is a physical change. When the liquid boils and becomes gaseous it is a physical change. It is a chemical change when the molecular structure has been changed in some way, here it has not.


What will happen if there is no physical and chemical change?

The system remain unchanged.


What happen to energy during a change of state Why is it a physical change?

Its released or adsorbed. Its "physical" because no new substance(s) is produced.


Physical change of a green plant?

The physical changes that happen in green plants are the changes in appearance. The difference between a sprout and a full grown plant is a physical change.


Is boiling water an example of chemical change?

No, a chemical change is when a substance and forms one or more new substances, it changes its composition. examples: changes in color production of gas formation of precipitate Boiling water is an example of physical change, it can be any phase change.


What is an example of a physical change to a rock that can happen quickly?

hammer+rock+hard impact= quick change physicaly


Is a fire a physical or chemical change?

A fire is a chemical change due to the irreversible changes that happen.


When you boil water is it a chemical change or physical change?

It is a physical change, known as a phase transition (see related links below).There is no chemical change: the water molecules remain water molecules. They have simply acquired enough kinetic energy to escape the attraction of the molecules in the liquid and move (almost) freely.


What happen to the salt when heated?

When salt is heated, it undergoes a physical change and may melt, releasing water vapor due to its hygroscopic nature. At very high temperatures, salt can decompose into its constituent elements, sodium and chlorine, through a chemical process called thermal decomposition.


Physical change definition?

A physical change is a term that contrasts a chemical change. A physical change is any change that does not alter the chemical identity of a substance.Usually an object that was physically changed can be reverted back to its original state (i.e. water and ice), while a chemical change cannot (i.e. paper burning).


What is the advantage of physical change?

One advantage of physical changes is that they are usually reversible. This means that the original substance can often be recovered after a physical change, such as melting or freezing, takes place. Additionally, physical changes do not alter the chemical composition of a substance.