Noah,+Ruby,+Maddie,+Sarah+G.,+Eddie

  1. __What data did your group record? Include temperature and pressure values using correct SI units.__
 * __Pressure Tester__**

The pressure began at 102kPa and increased to 106kPa. The temperature of the cold ice water began at 2*C and stayed at 2*C. The temperature of the hot water began at 43C and ended at 43C.

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

The bottle deflated in the cold water and was mushy. In the hot water, the bottle became hard and filled back up with air. WHen we placed the bottle into the cold water, the bottle started to have many dents in it because all the particles inside the bottle were closer together, so they did not need as much volume as the bottle had inside of it. When we put the bottle into the warm water, the particles started spreading out and the bottle was quickly filled up hard with no dents or any unfilled space.

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

The pressure of the bottle went down when the bottle was dipped the cold water. In the hot water, the pressure of the bottle went up. That's because the particles in the cold water are moving slower with less energy unlike the particles in the hot water that move faster. As a result, the bottle in the hot water had more pressure in it than the bottle in the cold water.

In the warm water the bottle expanded and it was hard to press down in because the pressure increased so much. While in the cold water it was quite easy to press down into the water because the pressure was so low and the bottle was starting to crinkle since all the particles were compacting together.  ** __Leaky Can__ **  1. __What data did your group record? Include temperature and relative humidity values using correct SI units__

The outside temperature started at 22*C and ended at 22*C. The inside of the can with the ice started at 6*C and ended at 5*C. The relative humidity began at 75% and dropped to 72%.

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

The metal can was clear and normal looking at first. There was no condensation. After we put the ice and the water inside the can, the can had water on the outside and was foggy looking. The water on the outside of the can formed droplets, this is because of surface tension.

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

The cold can was sitting in a room with two boilers filled with heated water which was producing vapor and increasing the humidity in the room. The water that had evaporated in the air began to stick to the can as the particles began to slow down. As a result, the water vapor condensed on the can because the temperature of the water in the can was lower than the condensation point of water.

We know that the water did not actually travel though the can, but because it was humid in the room and colder inside the can, condensation formed on the outside of the can. The proof we have to know that the water did not travel through the can is from the food coloring that we put in the water, inside the can. The water that had condensed on the outside of the can was clear, which proved that it did not travel through because it was not blue like the water on the inside of the can was.

The can was room temperature on the outside and was shiny and smooth with nothing on it. After the experiment was done there was water vapor on the outside of the can. It came from the humidity in the air when it touched the cold water and cold can from the ice.