Objective: To observe a Mentos geyser and measure several quantities involved in the eruption, then determine the speed of the fix and the power of the eruption. Procedure

Step 1: Determine and record the mass of the demonstration ingredients before the demonstration. The ingredients are the 2-liter bottle of soda and the Mentos. (Seven Mentos seems to work well.)

Initial Mass= 2075.2 grams

Step 2: Prepare the eruption in an open outdoor space where splashing diet soda will not create a problem.

Step 3: Prepare a means to measure the maximum height of the eruption.

Step 4: Prepare to measure the duration of the eruption. That is, you will start timing when the fizz first emerges from the bottle and stop timing when the column of fizz collapses.

Step 5: When preparations are complete, activate the demonstration by dropping the candies into the soda and observe the height and time of the eruption.

Maximum Height of Eruption= 1.626 meters

Time of Eruption= 2.0 seconds seconds

Step 6: Measure and record the mass of the ingredients (Mentos, soda, and bottle) that remain after the eruption has concluded. Final Mass= 643.3 grams

1. What type of energy (kinetic or potential) does the fizz have when it emerges from the bottle on Its way up?

2. What type of energy does the fizz have when It reaches the top of its flight and ls about to come back down?

3. How much mass was ejected from the bottle during the eruption?

4. Assume that all the mass ejected in the eruption rose to the maximum height measured during the demonstration. Calculate the potential energy of all the fizz at that height. (Start by writing the equation for potential energy.)

5. According to the principle of conservation of energy, the potential energy of the fizz at o the top of the flight is equal to the kinetic energy of the fizz when it emerges from the bottle. Write the equation for the kinetic energy of an object in terms of its mass and speed.

6. Rearrange the equation to solve for the speed of the soda pop as it emerges from the bottle.

7. Power ls the rate at which work ls done or energy is transformed. That ls, Power= Energy/ Time Use the energy found above and the time measured during the demonstration to calculate the power developed In the eruption.