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While a chemical change in an object can lead to its expansion, Take a piece of iron rusting for example, the same piece of iron could expand as a result of it being heated. So it would be reasonable to say neither. expansion is an increase of volume or area being taken up .
Expansion is a physical property. It refers to the increase in volume or size of a substance when subjected to changes in temperature, pressure, or other external conditions. It does not involve any changes in the chemical composition of the substance.
Expansion of metals due to heating (as referenced by coefficient of expansion) is a physical change.
Expansion of metals as a phase change (e.g. from alpha to delta-phase plutonium) is likewise a physical change. This is due to different ordering of atoms in the lattice, not just increase in distance due to higher energy in the bonds between them.
Expansion of metals due to void swelling is a physical change.
You'll have to make a semantic decision about something like alpha-particle absorption, where the alpha will take up two electrons from the metal and convert to helium. I consider this a physical change, a bit like ionization in reverse.
Any chemical change that affects 'expansion' -- in particular, through corrosion inclusions -- does not leave the original metal unaffected. (The inclusions will be oxides, chlorides, etc., with very different physical and mechanical properties). While a metal part or component may change shape and size, and this will almost always be an expansion due to the addition of atoms in combination with the metal's, I don't think this is what the original question was asking about. I invite the original questioner to add to or clarify what they mean by 'expansion of metals' if the above isn't clear enough.
If matter expands, it is typically considered a physical change. It did not change chemically. It merely changed in size.
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Is thermal expansion a chemical property?
No, thermal expansion is a physical property, not a chemical property. It refers to the tendency of matter to change in shape, area, and volume in response to a change in temperature. It does not involve any change in the chemical composition of the substance.
Is color a chemical or a physical properties?
Color is a physical property, not a chemical property. It is determined by how an object interacts with and reflects light, rather than its chemical composition.
Is expansion physical or chemical change?
Expansion is a physical change because it involves a change in the state or size of matter without altering its chemical composition.
Is the color of a copper wire a physical property or chemical property?
The color of a copper wire is a physical property. Physical properties can be observed or measured without changing the substance's chemical composition.
Is a melting point a chemical property?
Yes, melting point is a physical property, not a chemical property. It is a characteristic of a substance that can help identify and differentiate it from other substances based on how it changes states from solid to liquid.
Is expanding a chemical or physical?
Expansion is a physical property.
Is expansion a phsical or chemical property?
physical
Is thermal expansion a chemical change?
No, thermal expansion is a physical change, not a chemical change. It occurs when a material expands or contracts in response to changes in temperature, without any change in the chemical composition of the material.
Is thermal expansion a chemical property?
No, thermal expansion is a physical property, not a chemical property. It refers to the tendency of matter to change in shape, area, and volume in response to a change in temperature. It does not involve any change in the chemical composition of the substance.
Is a shape a physical or chemical property?
physical property
Is a nonflammable a physical or chemical property?
chemical property
Is size of an object a physical property a physical change a chemical property or a chemical change?
i am pretty sure it is a physical property! :)
Is silver tarnishing a physical property a physical change a chemical change or a chemical property?
a physical property
Is flammability a physical property?
Flammability is a physical chemical property of materials.Flammability is a chemical property.
Is density physical or chemical?
Density is a chemical property.
Is neutralizing a base a chemical or physical property?
It is Chemical Property that can Neutrilize a Base
Is Acetone a physical property or chemical property?
Acetone is a chemical. It has both chemical and physical properties.
