Define a physical and a chemical change. What are the characteristics of physical change? Define the following terms: 1. Rusting of iron 2. Reversible and irreversible changes 3. C... Define a physical and a chemical change. What are the characteristics of physical change? Define the following terms: 1. Rusting of iron 2. Reversible and irreversible changes 3. Crystallisation.
Understand the Problem
The question is asking for definitions and explanations related to physical and chemical changes in science, as well as specific phenomena like rusting, reversible and irreversible changes, and crystallisation. It focuses on understanding scientific concepts in a structured manner.
Answer
A physical change alters the state or appearance without forming a new substance. Chemical change produces a new substance. Characteristics of physical change: 1. No new substance formed. 2. Reversible. 3. Change in shape, state, size. Definitions: 1. Rusting of iron: Formation of iron oxide. 2. Reversible: Change that can be undone. Irreversible: Change that cannot be undone. 3. Crystallisation: Formation of crystals.
Define a physical and a chemical change. What are the characteristics of physical change? Define the following terms: 1. Rusting of iron 2. Reversible and irreversible changes 3. Crystallisation.
Answer for screen readers
Define a physical and a chemical change. What are the characteristics of physical change? Define the following terms: 1. Rusting of iron 2. Reversible and irreversible changes 3. Crystallisation.
More Information
A critical aspect of physical changes is that they usually involve changes in physical properties such as phase, shape, and size, without altering the chemical composition. On the other hand, chemical changes alter the fundamental chemical structure of the substance, which makes the change generally irreversible.
Tips
A common mistake is to confuse physical changes with chemical changes. Remember: Physical changes affect physical properties without changing the substance's identity, while chemical changes create new substances.
Sources
- Physical Change & Chemical Change - BYJU'S - byjus.com
- 3.6: Changes in Matter - Physical and Chemical Changes - chem.libretexts.org
- Examples of Physical Changes and Chemical Changes - ThoughtCo - thoughtco.com
