Emily+B,+Cayla,+Marc

 Pressure Tester:  What observations did your group make? What did the bottle look like and feel like?  In this experiment I placed a bottle, filled with nothing but air, inside of 2 tubs: a hot tub and a cold tub.When I pushed the bottle while it was in the cold water, it was squishy with may dents in it. When I pushed into the bottle while it was in the hot water, it was firm, hard do push into, and was completely inflated.

What data did your group record? Include temperature and pressure values using correct SI units  Before experement:: Cold water: 5˚c Hot water:42˚c Pressure: 99 KPa

In the hot water::: Pressure- 97.70 KPa Temperature- 46.5˚c

In the cold water::: Pressure- 119.10 KPa Temperature- 3.5˚c 

What conclusions can your group make? Please explain why the bottle did what it did in the two different baths. This occured because in cold water, the particles move slower. In the hot water, the particles move faster. This affected the experement because the air in the bottle in the cold water slowed down taking up less space, so it got compressed. In the hot water the air particles sped up, pushing on the walls of the bottle causing it to expand again to its maximum size. This also happened because of Charles law. Charles law states that when the amount of gas is the same, but the temperature changes, the mass of the gas will change. This is shown when the bottle filled with air (oxygen and carbon dioxide) is placed into tubs with hot and cold water. When it is put into the cold water, dents appeared and the mass got smaller. When the bottle was put into the hot water, it inflated again but so much so that it was at a point where it was firm.

Leaky Can:

 **1.What data did your group record? Include temperature and relative humidity values using correct SI units? **  Our group's data is on logger-pro which is unaccessable on this computer at this time.

**2. What observations did your group make? What did the metal can look like and feel like both before and after? **  Before the test, the metal was free of any water vapors on the outside of the can: it was shiny, circular and dry. After the can was full with the cold water and ice, a water vapor condensed on the outside of the can. The water on the outside of the can (clear) was not the same color as the water on the inside (blue and green).  <span style="color: #246edb; font-family: arial,helvetica,sans-serif; font-size: 13px; line-height: 19px;">3. ** What conclusions can your group make? Please explain why the metal can did what it did. Please be very descriptive in your explanation ** <span style="color: #246edb; font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;">. <span style="font-family: 'Comic Sans MS',cursive; font-size: 16px; line-height: 23px;"> The steam that was created by the boiling water (vaporization) stuck to the side of the can. This is so because water vapors in the air transform into water through a process called condensation. When there is a cold object, the water vapor, everywhere in the air, sticks to the cold object. This is so because the when particles get colder, they lose energy and are forced to come together and stay onto the cold object. Condensation is the process of a gas changing into a liquid. The metal can became wet and foggy becase the water vapor in the air stuck to the cold can making the can wet and foggy. When there is a cold liquid in a cup and the cup soon becomes wet, it is not coming from the drink, but the fact that water vapor in the air is being slowed down and forced to condense to water on the cup.