Gas law

Date: 11/14/2012

Name: Gabriel Robinson

Gas laws

      There are three gas laws in chemistry. The Charles gas law, the Boyles gas law, and the Gay-Lussac's gas law. in learning about the laws we used the PTV chart. the PTV chart stands fo pressure, temperature, and volume.

        Charles gas law:  Charles law states that as vloume increases the temperature will also increase, and vise-versa. An example was the when we did the egg experiment and we had to get the egg out. We increased the temperature making volume increase, thus forcing the egg out. A real life example is when you leave a bike outside while it is winter. The air gets colder and and the tire will begin to "deflate." Whats happening is that the air in the tire is decreasing in volume, there is still the same amount of air in the tire, but it doesnt show it. 

         Boyles gas law:  States that when pressure goes up, volume goes down. And when volume goes up, pressure goes down.  An example of the law is when we used a tire pump and pumped a bottle up. Inside of the bottle was a seringe, and with the more pressure added the volume inside of the bottle increased. A real life example of this is a spray paint can. You increase the preasure in it making the particles come closer together decreasing their volume. 

         

         Gay-Lussac's: States that when temperature goes up/ down, so deos pressure. And when pressure goes up/ down, temperature goes up. An example of this is when we increased the amount of pressure in a pop bottle, inside of the pop bottle was a temperature gauge. As we filled it up with more air, the temperature increased.  A real life example of this is when you fire a cannon. The temperature in the barrel increases, making pressure increase, which forces the canon ball out.

Cartesian Divers

Date:  8/31/2012

Name: Gabriel Robinson

Cartesian Divers

 

 

 

Materials: pipette's, a 2-Liter, a washer, h2o, tape, and paperclips.

 

 

Safety Concerns:  None.

 

 

Procedure:

 



 

        First fill up a 2-Liter, all the way to the top - the less air the better.  Then cut one inch off the pipette, to make it easier to work with.  Put a washer on the pipette at the mid-way point.  Secure the wasger with tape.  Fill the pipette up with a little water, and put it into the 2-Liter. Cap off the 2-Liter, but be careful not to create a vacuum. Then apply pressure to the bottle and the pipette will sink.

 

 

 

How Does it work?

 

 

 

       The Cartesian Divers work because of pressure. They float because they are less dense than water, which is 1g per ml. The air makes the pipette's less than 1. When you apply force to the bottle you are forcing watter into the pipette, thus making it sink. When you release the pressure the watter escapes and it will rise to the top.  Now, the more water already in the pipette's will make it sink at different speeds, same with weight. Brakes on a car, or your heart are very similar to Caresian Divers.

 

 

 

My Results/ Errors:

 

 

       When my partner and I started off we had to much air in the 2-Liter, making it harder to sink.  We eventually got help from Zach and from Mrs. Sorenson. They showed us how to correctly make the Cartesian Divers sink.  After we fixed it, by adding more water and taking a little water out of the pipette we finally succeeded. In the end we got three to successfully sink and come back up in the correct order.



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