Question
whch is Chemical Change
Combustion, reacts with acid, water and air
Cut apple, heat changes, alcohol evaporates, ice melts
Tarnishes, rust, ph, rots, food digest
Melting point, hardness, luster, odor
Combustion, reacts with acid, water and air
Cut apple, heat changes, alcohol evaporates, ice melts
Tarnishes, rust, ph, rots, food digest
Melting point, hardness, luster, odor
Answers
Answered by
GPT 3.5
Chemical Change is represented by the following examples:
1. Combustion: When a substance reacts with oxygen to produce heat and light, such as burning wood or gasoline.
2. Reacts with acid: When a substance undergoes a chemical reaction when exposed to an acid, such as the fizzing of baking soda when mixed with vinegar.
3. Reacts with water: When a substance undergoes a chemical change when exposed to water, such as the rusting of iron when in contact with moisture.
4. Reacts with air: When a substance undergoes a chemical change when exposed to air, such as the oxidation of metal, resulting in the formation of rust.
5. Tarnishes: When a metal loses its shine and develops a dull surface due to oxidation, such as the tarnishing of silver jewelry over time.
6. Rust: When iron or steel reacts with oxygen in the presence of moisture, resulting in the formation of iron oxide, which is commonly known as rust.
7. pH: When a substance undergoes a chemical change in its acidity or alkalinity, such as the digestion of food in the stomach with the help of stomach acid.
8. Rots: When organic matter decomposes due to the action of bacteria, fungi, and other microorganisms, resulting in a breakdown of the material and the release of gases.
9. Food digest: The process by which food undergoes chemical changes in the body to be broken down into nutrients and absorbed for energy.
10. Odor: When a substance emits a distinct smell due to the release of volatile compounds, such as the smelling of rotten eggs due to the presence of hydrogen sulfide gas.
On the other hand, the properties mentioned in the last set (melting point, hardness, luster, odor) are physical properties rather than chemical changes.
1. Combustion: When a substance reacts with oxygen to produce heat and light, such as burning wood or gasoline.
2. Reacts with acid: When a substance undergoes a chemical reaction when exposed to an acid, such as the fizzing of baking soda when mixed with vinegar.
3. Reacts with water: When a substance undergoes a chemical change when exposed to water, such as the rusting of iron when in contact with moisture.
4. Reacts with air: When a substance undergoes a chemical change when exposed to air, such as the oxidation of metal, resulting in the formation of rust.
5. Tarnishes: When a metal loses its shine and develops a dull surface due to oxidation, such as the tarnishing of silver jewelry over time.
6. Rust: When iron or steel reacts with oxygen in the presence of moisture, resulting in the formation of iron oxide, which is commonly known as rust.
7. pH: When a substance undergoes a chemical change in its acidity or alkalinity, such as the digestion of food in the stomach with the help of stomach acid.
8. Rots: When organic matter decomposes due to the action of bacteria, fungi, and other microorganisms, resulting in a breakdown of the material and the release of gases.
9. Food digest: The process by which food undergoes chemical changes in the body to be broken down into nutrients and absorbed for energy.
10. Odor: When a substance emits a distinct smell due to the release of volatile compounds, such as the smelling of rotten eggs due to the presence of hydrogen sulfide gas.
On the other hand, the properties mentioned in the last set (melting point, hardness, luster, odor) are physical properties rather than chemical changes.