Gas Laws

There were three gas laws observed in the stations that we did

• Boyle's Law => Constant temperature - pressure and volume are inversely related (do opposites)
•  Charle's Law => Constant pressure - if temperature goes up then volume does the same (directly related)
• Guy- Lusaac's Law => Constant volume - temperature and pressure are directly related

We were observing each of these different laws in these stations (obviously different laws for each station).

      As I observed Station 4 (Pop-can Lab) I believed it was Charle's Law.

Reasons are as stated:

• We heated the can with some water in it which  increased vibration and movement of the molecules in the water. And when we quickly changed the temperature, the energy that was moving the molecules around faster and faster, was suddenly decreased and almost deceased, therein bringing the molecules quickly together which decreased the volume just as the temperature was. This shows just like in it's definition Charle's Gas Law says temperature and volume are directly related.
• Also as stated in it's definition the pressure remained constant, all that changed was the temperature and the volume.

                                                      ==> Courtesy of chemteacher.chemeddl.org

     As I observed Station 1 & 2 (the marshmallow in the syringe) I believed it was Boyle's Law

Reasons are as stated:

• When you pulled back on the syringe, that decreased pressure and the marshmallow expanded. This occurred because when you reduce the force that was making the molecules of the marshmallow exist in closer quarters, then when you pull back on the syringe your are reducing that force. Which in turn is letting the molecules of the marshmallow to spread apart and have more room to move around. The less pressure you have the greater the volume of the marshmallow.
• Also the definition of Boyle's states that volume and pressure are inversely related, which as how I just described the lab, when you reduce the pressure on the marshmallow the volume of the marshmallow increases, confirming this lab as Boyle's Law
• Also as stated in it's definition it says that temperature must stay constant, which throughout this whole station the temperature was constant.

                                         ==> Courtesy of kingsford.org

       As I observed the Pressure & Temperature Lab shows Gay-Lussac's Law

Reasons are as stated:

• Throughout this lab I observed that the volume of the bottle and the syringe inside never changed, which Gay-Lusaac's Law states that volume must remain the same.
• In this lab it obviously shows how temperature and pressure are directly related, because as Gay Lusaac's Law states, volume must remain the same but temp. and pressure are directly related. During this lab, as pressure increased the molecules inside of the bottle became more and more compressed, which allowed for less movement, which in return lowered the temperature of the interior. Greater pressure equals colder temperatures because at higher pressure the molecular friction reduces, which doesn't generate any energy (heat).