Lili,+Nikki,+Brianna,+and+Cameron

=**Pressure Tester**=

1. What data did your group record? Include temperature and pressure values using correct SI units. Our group recorded the effect of the pressure on the bottles in the cold and hot water tubs.
 * || Average Pressure (KPA) ||
 * Hot Water || 106.7 ||
 * Control || 98.6 ||
 * Cold || 97.69 ||

control || 3.994 20 ||
 * || Average Temperature (Celsius) ||
 * Hot Water || 36.02 ||
 * Cold Water

2. What observations did your group make? What did the bottle look like and feel like?

There were two tubs of water and one of the tubs was filled with cold water and the other tub was filled with warm water. The bottle originally felt like it did not have a lot of pressure in it and could be squeezed without much difficulty, but once placed in the cold water the bottle felt like it shrunk. The reason for this was because the atoms in the bottle were moving slower and the pressure was reduced because of the cold. After the bottle was placed in the warm water the bottle felt like it had expanded. The reason for this was because the heat caused the atoms to gain more energy and move more, also the bottle had more pressure in it because of the heat as well.

3. What conclusions can your group make? Please explain why the bottle did what it did in the two different baths.

In conclusion our group made the conclusion that the bottle contained more pressure in the hot tub of water, because heat causes more pressure by the atoms moving and bouncing around. We also noticed that the cold water caused the bottle to have less pressure because cold temperatures make atoms come closer together and not move as much. The cold made the atoms shrink so the water bottle had closed up more.

=Leaky Can=

1.What data did your group record? Include temperature and relative humidity values using correct SI units.

temperature outside: 22.6 c temperature inside: 23.6 c humidity: 59.36%
 * Without ice in the can:

With ice in the can: temperature inside: 2.5 c temperature outside: 21.6 c humidity: 68.96% **

2.What observations did your group make? What did the metal can look like and feel like both before and after?

We recorded that the humidity was 75% before and after the experiment. The metal can has luster, and the can is a perfect circle. The can is silver and also dry before the experiment. After the experiment the can had water on it because of condensation. the water is clear because the water on the can is from the air not from inside the can.

3.What conclusions can your group make? Please explain why the metal can did what it did. Please be very descriptive in your explanation.

In conclusion our group learned the process of condensation. The can had ice cold liquid inside the can, which gave off a cool and clear water vapor. There was also a pot of boiling of water with steam projecting off the pot. The steam from the boiling water created humidity in the air, and when the humidity interacted with the cool water vapor, the gas transformed into liquid on the cold metal can.