Kinetic and Potential Energy
Investigation 3 – PostLab
Complete the Analysis Questions in your SDR then discuss them as a class.
- Think about the chemical reaction of vinegar and baking soda and the information in the Background at the beginning of the Investigation. What caused the circumference of the balloon to change?
- What type of energy was in the chemical reaction of baking soda and vinegar?
- What type of energy did the balloon have when it was inflating? When it stopped inflating?
- Was energy converted during the experiment? Why?
- Look at the observations column of Table A. What signs did you observe that suggest the rate of the chemical reaction and the amount of product formed changed with different amounts of vinegar?
- How did the amount of chemical potential energy change as the amount of vinegar increased?
- As the amount of vinegar increased, what happened to the circumference of the balloon?
- Use the graph to make a prediction. What would the circumference of the balloon be if the volume of vinegar was 5 ml? Use proper units.
- As the amount of vinegar increased, what happened to the kinetic and potential energy of the balloon?
- Think about the data in Table A and the graph. Describe the relationship between the amount of vinegar in the reaction, the chemical potential energy of the reaction, and the kinetic and potential energy of the balloon.
Note: Questions marked with a triangle (∆) are included to enrich your understanding. These questions do not appear in your SDR but may be used as additional discussion points during the PostLab.
- ∆ Can you think of some ways that the energy from chemical reactions is used in everyday life?
Complete the Focus Questions in your SDR then discuss them as a class.
- Can one form of energy be converted to another? Support your answer with data from the experiments.
- How does converting energy from one form to another relate to the Law of Conservation of Energy?