### Demo #5: Volume-Temperature-Pressure Relationships

Demo #5

Purpose: Balloons
To determine the relationship between temperature and volume.

Purpose: Launching Apples
To determine the relationship between volume and pressure.

Purpose: Can Implosion
To determine the relationship between pressure and volume.

Background:
A diameter the length from one point of a circle to another in a straight line without any curves or angles.
Temperature is the measurment of heat or how hot an object (gas,liquid,solid) is.
Volume is a 3-Dimensional object that takes up space.
Pressure is the amount of force applied on an object.

Materials: Balloons
• 2 Balloons
• 2 Beakers
• Water
• Ice
• Hot plate
Materials: Launching Apples
• 2 Apples
• Tube
• Stick
Materials: Can Implosion
• A soda can
• Water
• Hot plate
• Beaker
• Tongs
Methods:
None

Procedure: Balloons
1. Obtain materials.
2. Blow balloons up; stop when the size of the balloons are slighty smaller than the beakers' diameters.
3. Observe the sizes of the balloons.
4. Pour water into one beaker until it is full.
5. Place the beaker full of water on the hot plate, and wait for the water to boil.
6. While waiting for the first beaker of water to boil, pour water into the second beaker until it is full.
7. Then pour ice into the second beaker, and wait for the water to become colder.
8. When the water in the first beaker is boiling, remove the beaker off the hot plate, and turn off hot plate.
9. When the water in the first beaker is boiling and the water in the second beaker has become as cold as it looks like it's going to get, place one balloon on top of each beaker.
10. Let the balloons float, do NOT submerge the balloons in the water.
11. Observe the sizes of both balloons.
Procedure: Launching Apples
1. Obtain materials.
2. Place one apple on one side of the tube.
3. Push the apple all the way into the tube by using a table to smash it in.
4. Place the second apple on the other side of the tube.
5. Push the second apple into the other side of the tube using the stick.
6. Observe.
Procedure: Can Implosion
1. Obtain materials.
2. Fill beaker with water.
3. Place an empty can on a hot plate.
4. After a few minutes, submerge the can into the beaker of water using the tongs.:
5. Observe.
Data: Balloons
 Balloon Before After Cold Water Unchanged Smaller and Colder Hot Water Unchanged Larger and Hotter

Data: Launching Apples
 Before After 1st Apple Pushed inside the tube Launched out of the tube 2nd Apple Placed in the opposite opening of the tube from the 1st apple Pushed into the tube

Data: Can Implosion
 Before After Can Hot round (can-shaped) Cooling wrinkled (imploded)

Analysis: Balloons
When a balloon was placed on the boiling water, it grew in size. This occurred because the temperature in the balloon grew when it was floating on the hot water. When the temperature went up, the atoms in the balloon started to move faster. The faster moving atoms in the balloon hit the walls of the balloon, expanding the rubbery solid. When the temperature increased, so did the volume.
When a balloon was placed on the cold water, it shrunk in size. This occurred because the temperature in the balloon shrunk when it was floating on the cold water. When the temperature went down, the atoms in the balloon started to move slower. The slower moving atoms in the balloon hit the walls of the balloon a fewer number of times, srinking the rubbery solid. When the temperature decreased, so did the volume.

Analysis: Launching Apples
When the second apple was pushed into the tube, the first apple launched out of the tube. The volume of air in the tube decreased when the second apple was being pushed into the tube. The atoms in the tube had less space to travel in, so most of them were bunched up. This meant an increase in pressure. Due to this increased and the movement of the second apple, all the atoms pushed towards the first apple, launching it/pushing it out of the tube. A decrease in volume, causes an increase in pressure.

Analysis: Can Implosion
When the can was heated, the temperature increased. When the hot can was placed in water at room temperature, the can imploded. When the can was placed in the water, the pressure increased. When the pressure increased, the volume decreased. This means that the can's volume decreased, which made the can implode.