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Because you cannot reverse the process, like you could a physical change.

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12y ago

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Is toasting bread a chemical change or a physical change?

Toasting bread is a chemical change because the heat causes chemical reactions to occur within the bread, leading to a browning effect and changing the chemical composition of the bread.


Is toast physical change or chemical change?

Making toast is a chemical reaction because you can't change it back into untoasted bread.The drying of the bread is physical but the actual caramelization or darkening of the outer bread layer is a chemical change. The outer edges of the bread are beginning to char. Generally, a color change is an indicator of a chemical change.


Is toasting bread a physical or chemical change?

Toasting bread is a chemical change because the heat causes a reaction in the starches and sugars present in the bread, resulting in a new substance with different properties than the original bread.


How is toasting bread chemical or physical change?

Toasting bread is a chemical change because the heat causes a chemical reaction in the bread, leading to the browning and change in flavor. This involves the Maillard reaction, where the sugars and amino acids in the bread react to form new compounds.


Is the toasting of bread a physical or chemical change?

This is a physical change and might include a chemical change due to the heat involved in taking the bread to its final appearance. the physical change because, there is a change in color(colour) and a slight change in shape depending on the toaster you are using.


Is toasted bread a physical or a chemical change?

Toasting bread is a chemical change because the heat causes the chemical composition of the bread to change, resulting in the browning or caramelization of the sugars in the bread. This change is irreversible, unlike physical changes such as cutting or crushing bread.


Toasting a slice of bread is physical change?

Toasting a slice of bread is actually a chemical change, as the heat causes a chemical reaction in the bread that results in browning and changing its texture. This irreversible process is different from a physical change, which does not alter the chemical composition of the substance.


Is baking dough into bread a chemical or physical change?

Baking dough into bread is a chemical change because the heat causes chemical reactions to occur in the dough, leading to the formation of new substances such as carbon dioxide and water vapor, resulting in the transformation of the dough into bread.


Is baking bread physical or chemical change?

Classify it as chemical, the heat is used mainly to speed up the reaction.


Is burning toast in the toaster physical or chemical?

Yes, it is. The process by which heat changes the molecules of the bread from white and soft to brown and crispy is a chemical change. A chemical change does NOT mean you have to add chemicals. It just means the chemicals (molecules) in the substance changed their chemistry. So slicing bread is a physical change, but toasting it is a chemical change.


Ummm a student removes a loaf of bread hot from the oven the student cuts a slice off the loaf and spreads butter on it is it chemical or physical?

Since it is the heat from the bread that causes the butter to change form (melt), and be absorbed by the bread, this should be classified as a chemical reaction.


Is toasting bread an example of a physical or a chemical change?

Yes it is, as the browning of the bread when you toast it, is a reaction between the reducing sugar and amino acids. The reaction is called Maillard reaction. In simpler words, the bread is being "burned" which is a chemical change as it cannot be reversed. You can't get back the same soft,fluffy, white bread after you toast it.