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A physical change is a change in the physical state of a substance. An example of a physical change is water turning to ice (a solid) when frozen. Its state of matter has changed, but it is still the same substance (water).
A chemical change is a change in the chemical structure of a substance(s). For example, when oxygen and magnesium react, they form magnesium oxide (a different substance). The chemical state of both the oxygen and magnesium atoms involved has changed.
Equations:
Oxygen + Magnesium --> Magnesium Oxide
O2 + 2Mg --> 2MgO
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoA chemical change results in a different chemical being formed; a physical change results in a chemical changing state, shape, etc.
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Is luster a chemical or physical?
Lustre is a physical property, because... Look up a few definitions of "chemical property." In every one you will find that it involves chemical reactions, or changes in the identity of a substance. Lustre (shininess) is a property that can be observed without any chemical changes to the substance, so it can't be a chemical property.
Chemical changes can be reserved by physical change?
No, chemical changes can only be reversed by chemical means, not by physical means.
Are phase changes physical or chemical in nature?
A phase change is a physical change. It is not a chemical change.
Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
Are changes in the state of matter are physical chemical or neither?
changes in states of matter are physical changes, as they do not affect the chemical properties of the substance
What are the chemical and physical changes of photosynthesis?
There are no physical changes. there are only chemical changes.
Is luster a chemical or physical?
Lustre is a physical property, because... Look up a few definitions of "chemical property." In every one you will find that it involves chemical reactions, or changes in the identity of a substance. Lustre (shininess) is a property that can be observed without any chemical changes to the substance, so it can't be a chemical property.
Are state changes chemical or physical changes?
Physical Changes
Are all physical changes accompanied by chemical changes?
Not all chemical changes are accompanied by a visible physical change. Most chemical changes however will be accompanied by a physical change.
Chemical changes can be reserved by physical change?
No, chemical changes can only be reversed by chemical means, not by physical means.
What are the definitions of chemical and physical properties?
The chemical def for this is ----- properties- the characteristics of matter ; how it behaves.
Are phase changes physical or chemical in nature?
A phase change is a physical change. It is not a chemical change.
Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
Which occurs more often on earth physical changes or chemical changes?
what involves both chemical and physical change on earths surface
Is physical and chemical changes a scientific method?
Chemical and physical changes are part of methods applied in science.
Is Reactivity chemical or physical changes?
chemical
Can chemical changes be revearsed by physical changes?
no
