This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: heat. Mixing: Steel Wool generating heat 1. Put the thermometer in the jar and close the lid. 2. Wait about 5 minutes and write down the temperature. 3. Remove the thermometer from the jar. 4. Soak a piece of steel wool in vinegar for one minute. 5. Squeeze the vinegar out of the steel wool pad. Wrap the steel wool around the bulb of the thermometer. 6. Place the thermometer and steel wool back into the jar and close the lid. 7. Wait 5 minutes. 8. Now take a look at the temperature. What happened to the temperature? Are you surprised that the temperature rose? The vinegar removes any protective coating from the steel wool, allowing the iron in the steel to rust . Rusting is a slow combination of iron with oxygen. When this happens, heat energy is released. The heat released by the rusting of the iron causes the mercury in the thermometer to expand and rise. Conclusion: Have them tell me what they learned today about heat?...
View Full Document
- Spring '11
- Thermodynamics, Rust, steel wool