Lab Report.pdf - Pressure Volume and Temperature Discovery...

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*-Primary Author Pressure, Volume, and Temperature: Discovery of the Gas Laws Experiment Three- September 28, 2016 Section 565, Tjader De Alba*, Sonia Summary The main goal of the experiment was to find the relationship between pressure, volume, and temperature, in a sample of gas. When pressure and volume and then pressure temperature were compared as they changed, what was the relationship that was found between pressure, volume, and temperature? This experiment can be found to be first performed by Robert Boyle in the 17 th century, and represents an empirical development of the ideal gas law. Through the data obtained, different mathematical equations can be found that represent the relationship between pressure, volume, and temperature of a gas. The first part of the experiment dealt with pressure and volume. A 20 mL syringe was obtained and the piston was moved to the 10 mL mark while the syringe was disconnected from the pressure sensor. The 20mL syringe was plugged into the pressure sensor securely so no air would escape. Through the use of LoggerPro on the computer the data was recorded. The piston was moved to different position ranging from 20-5 mL, and the pressure was recorded at these different volumes. This was done for a total of six measurements. The second part of the experiment dealt with pressure and temperature. A water bath was prepared by filling a 600 mL beaker about two-thirds of the way full with, and then the beaker was placed to boil on a hot plate with a stir bar in it. A pressure sensor was inserted into Channel 1 of the LabPro interface and the temperature probe was inserted into Channel 2. A rubber-stopper assembly, with heavy-wall plastic tubing connected to one of the valves, was inserted into the opening of a dry 125 mL Erlenmeyer with the two-way valve left open to let air into the flask. The connector of the plastic tube was connected to the pressure sensor. The two- way valve was then closed to make the flask airtight. The computer was then prepared for collecting data and the flask was put into the boiling water bath. The flask was held by a three- pronged clamp so that the flask was mostly submerged, and the temperature was put into the water bath. The pressure and temperature readings stabilized and the first pressure-temperature data pair was collected. The heat was then turned off and the water allowed to cool. Every time the temperature dropped five degrees Celsius, the next pressure-volume data pair was collected. This was done until the temperature hit five degrees Celsius. At the end of the first part of the
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experiment, it was found that as the volume decreased, the pressure increased, and as the volume increased, the pressure decreased. At 5 mL, the pressure was recorded at 189.8338 kPa, at 7 mL, the pressure was recorded at 139.4561 kPa. At 20 mL, the pressure was recorded at 52.8148 kPa, at 17 mL, the pressure was recorded at 60.8856 kPa. Volume and pressure was found to be
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