When vinegar and baking soda are mixed together, the evidence that indicates a chemical change includes:
- The solution heats up or cools off: This indicates a reaction taking place where energy is exchanged, characteristic of a chemical change.
Additionally, you would also observe:
- Bubbling or fizzing: This is the result of carbon dioxide gas being produced during the reaction, another indicator of a chemical change.
The changes in size or shape alone are not definitive indicators of a chemical change, as physical changes can also cause such variations. Therefore, the most compelling evidence from the options provided is that the solution heats up or cools off.
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