In September 1998,Wilson described a useful classroom activity for the study of chemical,equilibrium that others have since praised and refined(1-4).I would like to suggest a modification whereby students use classroom clickers to remotely submit answers that can be immediately counted and displayed on a computer.The illustrative power of the activity is not only preserved,but augmented,and time can be saved since there is less to hand out and organize.All that is needed beside the clickers is a coin or die for each student to randomly dictate individual outcomes.
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