No, not always. For example, if you mix salt and water, no chemical change takes place. The salt dissolves in the water and a solution is formed, which is not a chemical change because the salt and water retain their individual chemical compositions.
Burning chocolate is a chemical change because the heat causes the chemical structure of the chocolate to change, leading to the release of new compounds and altering the composition of the chocolate.
Boiling potatoes is a physical change, not a chemical change. The heat causes the starch in the potatoes to gelatinize and the cells to rupture, but the chemical composition of the potatoes remains the same.
Yes, yellowing of newspapers in the sun is a chemical change. The exposure to sunlight causes a chemical reaction in the paper fibers, breaking down the cellulose molecules and leading to a change in color.
It's a chemical change: heat alters the protein bonds in the egg.
Heating a cup of tea is a physical change, not a chemical change. The heat causes the molecules in the tea to move faster, but the chemical composition of the tea remains the same.
It is true that a chemical reaction causes a chemical change. An example of this can be seen by adding baking soda to vinegar.
a chemical reaction
chemical change
Yes. The charging causes a chemical change in the electrolyte of the battery.
Grilling milkfish is a chemical change because the heat causes the proteins in the fish to denature and undergo chemical reactions that change its composition and flavor.
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.
Burning chocolate is a chemical change because the heat causes the chemical structure of the chocolate to change, leading to the release of new compounds and altering the composition of the chocolate.
It's a chemical change. A chemical change is any change that causes a substance to change into another substance. A sign to know whether it's a chemical change or not, are the changes in odor. When something decays the change in smell is very powerful. Therefore, it is a chemical change.
Boiling potatoes is a physical change, not a chemical change. The heat causes the starch in the potatoes to gelatinize and the cells to rupture, but the chemical composition of the potatoes remains the same.
It is a chemical process. The diesel gets compressed with air which in turn causes heat which in turn causes combustion.
oxidation causes rust to form
Hormones