Question
What change is chemical
Answers
GPT-4o mini
A chemical change is a type of change that results in the formation of one or more new substances with different chemical properties from the original substances. During a chemical change, the molecular structures of the reactants are altered, and new bonds are formed or existing bonds are broken. This process is often accompanied by observable signs such as changes in color, temperature, the production of gas (bubbling or fizzing), the formation of a precipitate, or changes in odor.
Examples of chemical changes include:
- **Rusting of iron**: Iron reacts with oxygen and moisture to form iron oxide (rust).
- **Burning wood**: Wood combusts, producing ash, carbon dioxide, and water vapor.
- **Digestion of food**: Enzymes break down food into smaller molecules, resulting in new substances being formed.
- **Cooking an egg**: The proteins in the egg undergo denaturation and recombination, leading to a solid structure.
In contrast, a physical change does not alter the chemical composition of a substance, such as melting ice or dissolving sugar in water.
Examples of chemical changes include:
- **Rusting of iron**: Iron reacts with oxygen and moisture to form iron oxide (rust).
- **Burning wood**: Wood combusts, producing ash, carbon dioxide, and water vapor.
- **Digestion of food**: Enzymes break down food into smaller molecules, resulting in new substances being formed.
- **Cooking an egg**: The proteins in the egg undergo denaturation and recombination, leading to a solid structure.
In contrast, a physical change does not alter the chemical composition of a substance, such as melting ice or dissolving sugar in water.