etf activities
DESCRIPTION
ETF Activities. Boyle’s Law. Lemon Battery. Lemon Battery. Objectives. - PowerPoint PPT PresentationTRANSCRIPT
Objectives
Construct a battery powered by a lemon.
Observe and measure electrical voltage.
Observe polarity(+, -)Analyze and discuss observations and
data with other students.Relate findings to principles of
electrochemistry.
Procedure
Insert the penny and the nail into the lemon on opposite sides of the lemon. Push them in about 1/2 inch.
BATTERY BASICSThe lemon juice allows the metal plates to gain or lose
electrons. Then, those electrons travel over to the other plate. ( Zn lose e- / Cu gains e- )
The reaction creates a different electrical potential on the two different plates, so connecting them shows a voltage difference.
e-
Objective
The purpose of this experiment is to determine the relationship between
pressure and volume of a gas at constant temperature.
Procedure A
Pull the plunger all the way out. Put your finger on the end. Place the plunger back into the syringe and push the plunger in
as hard as you can.
It gets (easier, harder) to push the plunger in as you decrease the gas volume.
Procedure B
Push the plunger all the way in. Put your finger on the end. Attempt to remove the
plunger from the syringe.
Is it difficult to remove the plunger?
Questions
In general, how do gas molecules create pressure upon their container? (What are the molecules doing?)
In Procedure A, when you compressed the plunger, it got more and more difficult to push the plunger in. Explain why. (Discuss molecules and collisions)
In Procedure B, you found that it was difficult to pull the plunger out. Why was it so difficult? (What force is responsible? Hint: vacuum is not a force)