Question
what are some major signs of chemical change in science
Answers
Answer
what are signs that only a physical change has occurred?
simply
simply
Answered by
GPT 3.5
Some major signs of chemical change in science include:
1. Formation of a new substance: The appearance of a new substance with different properties from the original substances is a strong indicator of a chemical change.
2. Color change: A noticeable change in color, especially when it cannot be reversed or easily explained by the addition or subtraction of other substances.
3. Formation of a precipitate: When two solutions combine and form a solid, insoluble substance called a precipitate, it indicates a chemical change.
4. Evolution of gas: Production of gas or formation of bubbles is often an indicator of a chemical reaction taking place.
5. Temperature change: A significant increase or decrease in temperature during a reaction can be a sign of a chemical change.
6. Release or absorption of energy: The release or absorption of energy, such as production of light, heat, or sound, during a reaction is a clear indication of a chemical change.
7. Change in odor: A noticeable change in smell, especially when it cannot be explained by the addition or removal of substances, may signify a chemical change.
8. Irreversibility: If a reaction cannot be easily undone or reversed, it often suggests a chemical change has occurred.
It is important to note that the presence of one or more of these signs does not definitively prove a chemical change has occurred. Multiple indicators should be considered together to determine the occurrence of a chemical reaction.
1. Formation of a new substance: The appearance of a new substance with different properties from the original substances is a strong indicator of a chemical change.
2. Color change: A noticeable change in color, especially when it cannot be reversed or easily explained by the addition or subtraction of other substances.
3. Formation of a precipitate: When two solutions combine and form a solid, insoluble substance called a precipitate, it indicates a chemical change.
4. Evolution of gas: Production of gas or formation of bubbles is often an indicator of a chemical reaction taking place.
5. Temperature change: A significant increase or decrease in temperature during a reaction can be a sign of a chemical change.
6. Release or absorption of energy: The release or absorption of energy, such as production of light, heat, or sound, during a reaction is a clear indication of a chemical change.
7. Change in odor: A noticeable change in smell, especially when it cannot be explained by the addition or removal of substances, may signify a chemical change.
8. Irreversibility: If a reaction cannot be easily undone or reversed, it often suggests a chemical change has occurred.
It is important to note that the presence of one or more of these signs does not definitively prove a chemical change has occurred. Multiple indicators should be considered together to determine the occurrence of a chemical reaction.
Answered by
GPT 3.5
Some signs that only a physical change has occurred include:
1. Change in size or shape: Alterations in the size or shape of a substance, such as cutting, bending, or stretching, generally indicate a physical change.
2. Change in state: A change from one state of matter to another, such as solid to liquid (melting) or liquid to gas (vaporization), is typically a physical change.
3. Dissolution: When a solid substance dissolves in a liquid, it is a physical change. The particles of the solid are still present, albeit dispersed in the liquid.
4. Mixing of substances: When two or more substances are combined and evenly mixed without any chemical reaction occurring, it represents a physical change.
5. Changes in state of solution: Changes like evaporation of the solvent from a solution leaving behind solute, cooling of a solution causing crystallization, etc. are examples of physical changes.
6. Reversible change: If the change can be easily undone and the original substance restored, it is likely a physical change.
It is important to consider that some changes may exhibit both physical and chemical characteristics. Therefore, understanding the context and multiple observations may help determine whether a physical or chemical change has occurred.
1. Change in size or shape: Alterations in the size or shape of a substance, such as cutting, bending, or stretching, generally indicate a physical change.
2. Change in state: A change from one state of matter to another, such as solid to liquid (melting) or liquid to gas (vaporization), is typically a physical change.
3. Dissolution: When a solid substance dissolves in a liquid, it is a physical change. The particles of the solid are still present, albeit dispersed in the liquid.
4. Mixing of substances: When two or more substances are combined and evenly mixed without any chemical reaction occurring, it represents a physical change.
5. Changes in state of solution: Changes like evaporation of the solvent from a solution leaving behind solute, cooling of a solution causing crystallization, etc. are examples of physical changes.
6. Reversible change: If the change can be easily undone and the original substance restored, it is likely a physical change.
It is important to consider that some changes may exhibit both physical and chemical characteristics. Therefore, understanding the context and multiple observations may help determine whether a physical or chemical change has occurred.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.