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Chemical change.
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∙ 13y ago
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Is rust forming on an iron nail a chemical change?
Yes. Rust on anything is always a chemical a change because a new substance is being formed.
When a physical change in a sample occurs which does not change?
Substance in the material Remain the same
Is water freezing an example of a different substance being formed?
No it is not!
Is expansion of iron a physical change?
Cutting iron is considered a physical change because there is not a new substance being formed. It is just changing the shape. It is still just iron.
When sugar dissolves in water how can you tell it's not a chemical change?
There is no new product being formed, eg. its just sugar plus water. It's not like a new substance is being formed. For example a chemical change could be Iron and oxygen, which forms something new, which is Iron Oxide. Get it?? :)
What kind of change occurs with no new substance being formed?
physical changes
A physical change is best defined as?
a process that does not change the chemical composition of a substance. A change in a substance with no new substances being formed
What type if change results in a new substance being formed?
chemical
What chemical reaction does not result in a new substance being formed?
phisical change
Why are metal alloys an example of a physical change and not a chemical change?
They are a physical change because it is not like burning where a new substance is being formed.
Is rust forming on an iron nail a chemical change?
Yes. Rust on anything is always a chemical a change because a new substance is being formed.
When a physical change in a sample occurs which does not change?
Substance in the material Remain the same
How is cutting a physical change?
Cutting iron is considered a physical change because there is not a new substance being formed. It is just changing the shape. It is still just iron.
What changes are evidence for a chemical change?
Remember that a chemical change is anything that alters the identity or composition of a substance. So something such as color change, a solid being formed, a gas being produced or temperature changing would constitute a chemical change.
Is water freezing an example of a different substance being formed?
No it is not!
Is expansion of iron a physical change?
Cutting iron is considered a physical change because there is not a new substance being formed. It is just changing the shape. It is still just iron.
When sugar dissolves in water how can you tell it's not a chemical change?
There is no new product being formed, eg. its just sugar plus water. It's not like a new substance is being formed. For example a chemical change could be Iron and oxygen, which forms something new, which is Iron Oxide. Get it?? :)
