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an exothermic process

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15y ago

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Baking powder bubbles and gives off CO2 when it is moistened is it a chemical or physical change?

It is a chemical change.


Is giving off light a physical or chemical change?

I would think it to be a Physical Change. Not chemical.


Is perspiration a physical change?

It is a chemical change. Actually "Perspiration" is a noun defined as the chemical product produced by sweat glands. sweating is a physical response to increased body temperature. and the reaction to sweating is the physical cooling that takes place when sweat or perspiration evaporates and gives off heat energy.


If Gasoline gives off fumes is it a physical or chemical change?

Chemical change because its form is a new state then what it was when it started (:


Is melting wax a physical chemical or nuclear change?

This is a physical change, not a chemical change! It is because all the wax is still all there as for if it was a chemical change it would be all gone!Physical. Its physical state changed from solid to liquid. It's chemical make up remains the same.Melting wax is a chemical change because a new substance is forming. Trust me im intelligent and we just learned this in science.physical change :)It is a chemical change because it gives off heat even when it is burning. heat is one of the signs that tell whether it is physical or chemical change. The signs are heat , light's ,gas,discolor.Melting was would be a physical change-- no chemical reaction occurs when something melts or boils. A burning candle is a chemical change, both can occur at the same time.


Is wax melting chemical or physical change?

This is a physical change, not a chemical change! It is because all the wax is still all there as for if it was a chemical change it would be all gone!Physical. Its physical state changed from solid to liquid. It's chemical make up remains the same.Melting wax is a chemical change because a new substance is forming. Trust me im intelligent and we just learned this in science.physical change :)It is a chemical change because it gives off heat even when it is burning. heat is one of the signs that tell whether it is physical or chemical change. The signs are heat , light's ,gas,discolor.Melting was would be a physical change-- no chemical reaction occurs when something melts or boils. A burning candle is a chemical change, both can occur at the same time.


Is the reaction between carbon dioxide and limewater physical?

Since it gives differed products, its a chemical change.


Is when a burner gets red hot an example of a chemical change?

This is indeed a physical change. There is a colour change, but if the substance is cooled down it is still the same. All that providing electricity is really doing is adding Energy to the burner.


Is odor physical or chemical?

it is a chemical component which gives bad odor


Is cooked food a chemical or physical change?

Cooking mainly is a chemical process in which we use acids like lime juice , alkalies and also some neutral solutions like water. The chemical reaction of these ingredients in presence of temperature gives food. Cooking can also be considered as a physical change since the physical features of the ingredients are changing.


When oil dissolves in gasoline and gives a homogeneous solution is it a chemical change or a physical change?

It is a physical change because no new substances are formed during the dissolving process. The oil and gasoline retain their chemical properties even though they are mixed together at the molecular level to form a homogeneous solution.


When milk turns sour is it a chemical or physical change?

chemical change