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Why are changes of state chemical changes?
They aren't; a change of state is a physical change
Why is dencity a physical change?
Density is classified as a physical property because the density of a substance can change when the substance changes state. Example: When water evaporates it is a physical change and the density changes. A chemical property is a property that describes its ability to react chemically with other substances and THEREFORE density is not a chemical property.
Is melting snow a physical change or chemical change?
Snow disappearing is a physical change. It is a combination of melting and then evaporating and of sublimation.
Is boiling gold a physical change?
Melting of gold for jewellery making is a physical change as no new substance is formed after melting. Changes in state or phase are physical changes.
Classify as chemical and physical change-freezing of water?
Physical. changes of state (solid, liquid, gas) are physical changes.
Are state changes physical or chemical changes?
A change of state: Solid <-> Liquid <-> Gas A change of state is a physical change.
Is melting point classified as a chemical property or a physical property?
physical. melting does not change the substance; it only changes the state of matter (or the movement of particles).
Does changes in a state of matter involve a physical change?
A chaqnge of the state of matter is allways a physical change.
Why are changes of state chemical changes?
They aren't; a change of state is a physical change
Is Boiling oil a physical change or a chemical change?
Physical ... it's only a state change. Cool it and it reverts to its old condition.
A physical change occurs when matter changes state?
no physical change does not change matter
Does a physical change occurs when matter changes state?
no physical change does not change matter
Why is dencity a physical change?
Density is classified as a physical property because the density of a substance can change when the substance changes state. Example: When water evaporates it is a physical change and the density changes. A chemical property is a property that describes its ability to react chemically with other substances and THEREFORE density is not a chemical property.
Is melting snow a physical change or chemical change?
Snow disappearing is a physical change. It is a combination of melting and then evaporating and of sublimation.
Why penny flattened by a hammer is a physical change?
It is a physical change, because it does not change in substance. A penny, whether in its normal state or flattened, is still a penny. Similarly, if you drop a watermelon and it breaks apart, that is also considered to be a physical change because it is still a watermelon. Things are considered to be chemical changes when the substance changes into something new, and is commonly classified as irreversible. When an object rusts, it is considered to be a chemical change. Chemical changes are associated with a temperature change, or a color change or bubbling or something of the sort. Physical changes deal with physical changes in state, for example, ice melting, or in the example you provided, a penny being flattened.
What is a change to a material that does not change its composition?
The kind of change described is referred to as a physical change. Examples of physical changes include, but are not limited to, changing the temperature or state of a substance, changing the shape of a substance, and breaking a substance into smaller pieces. A change that alters a material's composition would be classified as a chemical change.
How does Matter Change Physical Changes?
It affects it state.
