- the wood disappear
- the temperature is increasing
- gases as carbon dioxide and water vapour are released
Because it lights so there has to be a chemical reaction. That's a fact.
Burning is an oxidation reaction; wood as a reactant is transformed in water and carbon dioxide (products).
Violent flame and acrid smell.
smoke
Because you can't put it back together. Imagine burning a piece of paper, there is no way that you can get that piece of paper back. Burning that piece of paper was a chemical change because you changed the chemical properties of the paper. Crumpling or cutting the paper doesn't change the molecular structure of the paper, so it is a physical change.
no, a chemical change is when something turns into something else. as an example burning paper is a chemical reaction because the paper turned into ashes and changed. but if you rip a piece of paper in half its still a piece of paper right. did that answer your question
It would be a chemical change because a new substance is formed (Calcium Chloride). A physical change doesn't change the substances involved, it just changes it appearance, such as ice melting, water freezing or becoming a vapor, or if you cut up a piece of paper.Physical changes can be reversed, while chemical changes can not. A chemical change involves a reaction, a new substance, and heat given off or absorbed. Burning paper is a chemical change, as is frying an egg, or burning gasoline.
Melting is a physical process; reaction with sodium is a chemical process.
Lighting A Match
Any chemical reaction produce a new substance.
A piece of wood by itself is not an example of a chemical reaction. However, when the wood is burned, it chemically combines with oxygen in the air, producing mostly water and carbon dioxide. Because new chemical substances are created in this combustion reaction, the burning of wood is a good example of a chemical reaction.
Because you can't put it back together. Imagine burning a piece of paper, there is no way that you can get that piece of paper back. Burning that piece of paper was a chemical change because you changed the chemical properties of the paper. Crumpling or cutting the paper doesn't change the molecular structure of the paper, so it is a physical change.
Yes. Rusting is a chemical reaction between iron and oxygen.
no, a chemical change is when something turns into something else. as an example burning paper is a chemical reaction because the paper turned into ashes and changed. but if you rip a piece of paper in half its still a piece of paper right. did that answer your question
Burning is a chemical change.
By burning it.
Cheimical change
The candle burning is a chemical process.
It would be a chemical change because a new substance is formed (Calcium Chloride). A physical change doesn't change the substances involved, it just changes it appearance, such as ice melting, water freezing or becoming a vapor, or if you cut up a piece of paper.Physical changes can be reversed, while chemical changes can not. A chemical change involves a reaction, a new substance, and heat given off or absorbed. Burning paper is a chemical change, as is frying an egg, or burning gasoline.
They are similar because you are producing a chemical change in both, making new substances.
Burning a paper. Any change where you can't go back to the original item is a chemical change. You can't go from ashes back to a paper. Crumpling a piece of paper is a physical change because it's still a piece of paper.