Shanxian Chemical
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HydrogenPeroxideBubblesInCutPhysicalOrChemicalChange
On the change of hydrogen peroxide in the blister wound
Apply hydrogen peroxide to the wound, and you can see that the gas is bubbling. Is this a physical change, or a chemical change? It needs to be investigated carefully.
The change of physics, the shape of the thing changes, but its essence remains unchanged. Such as water forming ice, ice turning water, but the shape is different, the water molecules are still water molecules. If hydrogen peroxide foaming in the wound is only a physical change, it should only be that hydrogen peroxide escapes from a liquid state to a gaseous state, but it is not the case.
In reality, hydrogen peroxide meets the wound tissue, and catalase catalyzes its decomposition. Hydrogen peroxide then converts into water and oxygen, and the chemical reaction formula is: $2H_ {2} O_ {2}\ stackrel {catalase }{=\!=\!=} 2H_ {2} O + O_ {2}\ uparrow $. In this case, the molecular structure of hydrogen peroxide disintegrates, and the new biomass water and oxygen have changed the essence of the substance, which is conclusive evidence of chemical change.
Therefore, hydrogen peroxide foaming in the wound is not a physical change, but a chemical change. Due to the formation of new substances, it is in line with the fundamental characteristics of chemical change.
Apply hydrogen peroxide to the wound, and you can see that the gas is bubbling. Is this a physical change, or a chemical change? It needs to be investigated carefully.
The change of physics, the shape of the thing changes, but its essence remains unchanged. Such as water forming ice, ice turning water, but the shape is different, the water molecules are still water molecules. If hydrogen peroxide foaming in the wound is only a physical change, it should only be that hydrogen peroxide escapes from a liquid state to a gaseous state, but it is not the case.
In reality, hydrogen peroxide meets the wound tissue, and catalase catalyzes its decomposition. Hydrogen peroxide then converts into water and oxygen, and the chemical reaction formula is: $2H_ {2} O_ {2}\ stackrel {catalase }{=\!=\!=} 2H_ {2} O + O_ {2}\ uparrow $. In this case, the molecular structure of hydrogen peroxide disintegrates, and the new biomass water and oxygen have changed the essence of the substance, which is conclusive evidence of chemical change.
Therefore, hydrogen peroxide foaming in the wound is not a physical change, but a chemical change. Due to the formation of new substances, it is in line with the fundamental characteristics of chemical change.
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