Predictions: Burning Ethanol Imagine you could see the atomic molecular scale. What atoms/molecules would you see going into the flame? What atoms/molecules would you see coming out of the flame? Draw arrows to show how you think atoms/molecules might be moving. Remember, changes in mass tell you that _______________________ are moving. 1. What is happening if the ethanol GAINS mass? 2. What is happening if the ethanol LOSES mass? Remember, BTB tells you about __________________________. Changes in the amount of a molecule means that matter has been rearranged. 3. What does it mean if the BTB turns YELLOW? 4. What does it mean if the BTB stays BLUE? Remember, cobalt chloride tells you about ______________________. Changes in the amount of a molecule means that matter has been rearranged. 5. What does it mean if the cobalt chloride turns PINK? 6. What does it mean if the cobalt chloride stays BLUE? Remember, energy cannot be created or destroyed. When fire burns, chemical energy from the burning substance is transformed into another kind of energy. 7. What forms of energy are in the ethanol BEFORE it burns? 8. What forms of energy will you see coming out of the fire? Data Collection Mass of ethanol: Balance #:_____________ Starting Mass Ending Mass Change in Mass Ending Color Change in CO2 Increase / Decrease / Stayed the Same Ending Color Change in H2O Increase / Decrease / Stayed the Same Color of BTB: Starting Color Color of Cobalt Chloride: Starting Color Energy Transformation: Starting Energy Chemical Observations: Ending Energy Predictions: Burning Ethanol Imagine you could see the atomic molecular scale. What atoms/molecules would you see going into the flame? What atoms/molecules would you see coming out of the flame? Draw arrows to show how you think atoms/molecules might be moving. Remember, changes in mass tell you that _______________________ are moving. 1. What is happening if the ethanol GAINS mass? 2. What is happening if the ethanol LOSES mass? Remember, BTB tells you about __________________________. Changes in the amount of a molecule means that matter has been rearranged. 3. What does it mean if the BTB turns YELLOW? 4. What does it mean if the BTB stays BLUE? Remember, cobalt chloride tells you about ______________________. Changes in the amount of a molecule means that matter has been rearranged. 5. What does it mean if the cobalt chloride turns PINK? 6. What does it mean if the cobalt chloride stays BLUE? Remember, energy cannot be created or destroyed. When fire burns, chemical energy from the burning substance is transformed into another kind of energy. 7. What forms of energy are in the ethanol BEFORE it burns? 8. What forms of energy will you see coming out of the fire? Data Collection Mass of ethanol: Balance #:_____________ Starting Mass Ending Mass Change in Mass Ending Color Change in CO2 Increase / Decrease / Stayed the Same Ending Color Change in H2O Increase / Decrease / Stayed the Same Color of BTB: Starting Color Color of Cobalt Chloride: Starting Color Energy Transformation: Starting Energy Chemical Observations: Ending Energy
