Physical vs. Chemical Change - CO2 Extinguisher

As we look at chemical vs. physical changes, we are beginning to explore how to tell the difference.

5 Changes that typically show a chemical reaction:

1. A gas is  formed
2. A new substance is formed
3. Heat and/or light is generated or lost
4. A new smell is formed
5. A dramatic color change occurs.

Below is a demonstration done in class, mixing baking soda and vinegar. The resulting reaction produced Carbon Dioxide which I used to put out candles.