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Name three signs of a chemical change that occur as a log burn in a fireplace?
Wiki User
∙ 14y ago
1) heat is evolved
2) it is quite difficult to react
3) new compounds are formed while others react
point 3 is the most important as a chemical change is one in which new compounds are formed.
Wiki User
∙ 14y ago
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What are some evidences that a chemical change occur?
Some physical signs are color change, bubbling, and rapid temperature reduction.
What happens to the composition of a substance during a chemical change?
Atoms are rearranged, heat may be given off, changes in color and odor might occur, or a gas or precipice may be formed. The composition is changed, and the above are signs of a chemical change.
Is fizzing a chemical change?
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
What are the sing of chemical change?
Signs of chemical change are when a substance changes into a new substance. Like Paper being burned turns into gray powder. That is a chemical change.
Why the signs of reactions for chemical reactions may occur?
Some indicators of a chemical reaction are:- formation of new compounds - change of color- change of odor- release of a gas- change of the temperature (absorption or release)- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion - sometimes a sound is produced - possible chemiluminescence
What are the signs of physical change from a chemical change?
Signs of physical change - Change in appearance,taste,display of substance Signs of chemical change- Change in chemical reaction
What are some evidences that a chemical change occur?
Some physical signs are color change, bubbling, and rapid temperature reduction.
What happens to the composition of a substance during a chemical change?
Atoms are rearranged, heat may be given off, changes in color and odor might occur, or a gas or precipice may be formed. The composition is changed, and the above are signs of a chemical change.
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 Buring wood a physical or chemical change?
Burning wood is a chemical change because it involves a chemical reaction between the wood and oxygen, resulting in the formation of new substances like carbon dioxide and water vapor.
What are signs of a chemical reaction?
Some signs could be: *solids forming *bubbles *color change *temp. change
Is fizzing a chemical change?
There are signs that you can see when a chemical change takes place. It is true that fizzing or foaming is evidence that a chemical change may have occurred.
What are the sing of chemical change?
Signs of chemical change are when a substance changes into a new substance. Like Paper being burned turns into gray powder. That is a chemical change.
Why the signs of reactions for chemical reactions may occur?
Some indicators of a chemical reaction are:- formation of new compounds - change of color- change of odor- release of a gas- change of the temperature (absorption or release)- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion - sometimes a sound is produced - possible chemiluminescence
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 a common sign that a chemical change has occurred?
A change in pH or conductivity will always hint to a chemical change. Also less technical signs can be a change in volume or color
What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
