by

# F. Lee Slick

Purpose:   This experiment is designed for Chemistry or Physics students.  If you like to eat in class, this experiment is for you.  Now if you can't cook you are in trouble.   Follow directions carefully and you will not have too many problems.  This is a good way to demonstrate rate of reaction of an event, and graphing of  data.

 Number of Pops Time in seconds Total Number of Pops 0 0 0 5 10 15 20 . . .

LIST OF MATERIALS:

200 kernels of popcorn
popcorn oil or cooking oil
coffee can and lid or 1000 ml beaker and foil (BE SURE THAT IT IS CLEAN)
graph paper, ruler and pencil
Bunsen burner or hot plate
popcorn salt

EXAMPLE OF GRAPH

Questions and Problems for your consideration:

• If you have not plotted a graph of  "Total number of pops vs. Time"   do so at this time and answer the following questions:

• What can you conclude from the graph?

• What does the graph show?

• Do you see a linear relationship?  What is the rate of reaction?  Try taking the slope of the linear relationship.

• Why didn't all the corn pop?

• I f  you burned your experiment, do it over, if you did not burn your experiment.  I'll help you eat it.  When eating be sure to count the number that have popped.

• Where there an equal number of pops in each time interval?

• What do you think would have happened if you had used 500 kernels instead of 200?  (referring to the graph)

• When you are done, be sure to clean up your mess.

Back to the SMART index page