Identifying Chemical vs Physical Changes

In summary, a chemical change involves a change in the chemical composition of a substance, resulting in the formation of new substances with different properties. On the other hand, a physical change involves a change in the physical appearance or state of a substance without altering its chemical composition. The best way to identify a chemical change is to observe the formation of new substances with different properties, while physical changes can be identified by changes in texture, shape, size, or state of matter. Yes, a substance can undergo both chemical and physical changes. Some chemical changes are reversible, while others are not. Understanding the difference between chemical and physical changes is important in various fields and helps us understand the behavior and properties of different substances.
  • #1
Maroc
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Homework Statement


How would you know wheather its a chemical change or physical change


Homework Equations





The Attempt at a Solution

 
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  • #2
What does your book say about?
 
  • #3
just says something about the physical apperance as for chemical a change in the gas happens...i don't get it
 

Related to Identifying Chemical vs Physical Changes

1. What is the difference between a chemical and physical change?

A chemical change involves a change in the chemical composition of a substance, resulting in the formation of new substances with different properties. A physical change, on the other hand, involves a change in the physical appearance or state of a substance without altering its chemical composition.

2. How can I identify if a change is chemical or physical?

The best way to identify a chemical change is to observe if there is a formation of new substances with different properties. Physical changes, on the other hand, can be identified by changes in texture, shape, size, or state of matter.

3. Can a substance undergo both chemical and physical changes?

Yes, a substance can undergo both chemical and physical changes. For example, melting an ice cube is a physical change, but then boiling the melted ice to form water vapor is a chemical change.

4. Are all chemical changes reversible?

No, not all chemical changes are reversible. Some chemical changes result in the formation of new substances with different properties that cannot be reversed. However, some chemical changes, such as dissolving salt in water, can be reversed by separating the substances through physical means.

5. Why is it important to understand the difference between chemical and physical changes?

It is important to understand the difference between chemical and physical changes because they have different implications and applications in various fields such as medicine, environmental science, and engineering. It also helps us understand the behavior and properties of different substances and how they can be manipulated or harnessed for various purposes.

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