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Before a physical change, the molecules of a substance maintain their original structure and composition, but they may have different arrangements or states. For example, in solid ice, water molecules are closely packed and vibrate in place, while in liquid water, they are more loosely arranged and can move past one another. Despite these changes in arrangement and energy, the chemical identity of the molecules remains unchanged throughout the physical change.
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Why a rotten fruit is a chemical change?
Rotting of fruit involves the breakdown of complex organic molecules into simpler compounds through biological processes like fermentation or decomposition. This transformation results in the formation of new substances with different properties, which is characteristic of a chemical change. The chemical composition of the fruit changes as new molecules are produced, distinguishing it from a physical change.
Does mixing borax and polyvinyl alcohol result in a chemical change?
Mixing borax and polyvinyl alcohol does not result in a chemical change. Instead, it forms a physical change known as cross-linking, where the borax molecules create bonds with the polyvinyl alcohol molecules to form a flexible slime-like material.
Is dissolving carbon dioxide in water a physical or chemical change?
It's a physical change because carbon dioxide still has it's same properties. It is not changed.Added:Even if you dissolve it in water it is still there thus making it a physical change and not a chemical change. If it were a chemical change then it would be changed for example, fire or burning things like logs and so forth. Dissolving something in water is not changing it completely it only has a minor change in how you see it, thus it is a physical change.The only 'chemical' change might be considered to be the protolysis of water being slightly enhanced by the hydrogen bonding to carbon dioxide molecules. But that is more a (very weak) 'chemical' change of water molecules rather than of CO2 molecules:(CO2)aq + 2 (H2O)l > (Cl-)aq + (H3O+)aq
How do you know when something has gone through a physical change?
A physical change refers to a change in the physical state or appearance of a substance without altering its chemical composition. You can observe a physical change by noting changes in color, shape, size, texture, or state of matter (solid, liquid, gas) of the substance. Additionally, physical changes are usually reversible.
What is a the difference between a chemical and physical change?
A physical change involves a change in the appearance or state of a substance without altering its chemical composition, such as melting ice or breaking glass. A chemical change, on the other hand, involves a rearrangement of atoms in molecules to form new substances with different chemical properties, like burning wood or rusting iron.
Do substance like molecules change during a physical change?
No the substances like molecules donot chane during physical change .
Is steam condenses on a cold window chemical change?
No, condensation of steam on a cold window is a physical change, not a chemical change. The water vapor in the steam undergoes a change in state from gas to liquid as it loses heat energy to the cold window, but the water molecules themselves remain unchanged.
What type of chage is melting ice?
Melting ice involves a physical change, as it transitions from a solid state to a liquid state while maintaining the same chemical composition. The process does not alter the molecular structure of the ice, making it reversible.
Is dissolving a fizzy tablet like vitamin C in water a physical change?
No, dissolving a fizzy tablet like vitamin C in water is a physical change. The tablet is still vitamin C molecules, just dispersed in the water. Chemical bonds in the vitamin C molecules are not broken during the dissolving process.
Why is burning plastic a physical change?
because it can't go back to what it looked like before.
Is starch gelatinization a chemical or physical change?
Starch gelatinization is a physical change because it involves the rearrangement of starch molecules in the presence of heat and water to form a gel-like structure without undergoing any chemical reactions.
What happens during physical changes?
The transformation of a liquid to a gas.
Difference between a physical change and a chemical change?
A chemical change is the change of one or more substances into other substances. A physical change is when the state or shape of matter is changed. In a chemical change molecules are combined or beak apart to form new substances.Rusting iron is an example of a chemical change. crushing a can or tearing paper can be an example of physical change.
Is a car crashing a physical or chemical change?
The key here is what happens to the matter. Does it change into a different material or just change shape? If the metal changes into a new substance like iron into rust then it would be chemical but this is definitely a physical change. - - - - - Car crashes can cause both physical and chemical changes. The bending of the car is a physical change, but if the wreck catches fire that's a chemical change.
Is Burning of LPG physical or chemical change?
Burning of LPG is a chemical change because it involves a chemical reaction between the LPG (composed of hydrocarbons) and oxygen in the air to produce heat, light, and new substances like carbon dioxide and water vapor. The original LPG molecules are transformed into different molecules during the combustion process.
Is there a difference between arrangement of atoms after a chemical and a physical change?
In a chemical change, the atoms or molecules are changed in that they become something else, like if something burns, while a physical change is if it changes state (e.g. gravy is like a jelly when it's cold so if you warm it up, it turns back into a liquid (physical change), but if you cook it too long it burns (chemical). That's how I remember it, anyway.
Dissolves in acetone is that a physical or chemical change?
Making a solution of something does not change its chemical make-up, it is simply dissolved in something else. For instance, salt dissolved in water is salt water -- the salt is still there and still tastes salty. So, it is a physical change.
