Discussion exp 6 - The reason our number was not the exact...

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Discussion The objective of part A of experiment 6 was to experimentally find the gas constant R. By using the equation PV=nRT and finding a value for all the other terms R can be found experimentally. The pressure used first was .944 the pressure of H 2 to find R corrected and the total pressure of the room .968 was used to find the uncorrected value of R. The volume of the gas was found through the experimental reaction where a piece of aluminum was placed in a buret of NAOH and then flipped upside down and placed in a beaker of water. By marking the initial volume of the buret and the final volume of the buret after the aluminum has fully dissolved gives the volume of H 2 gas. Next the number of moles of H 2 gas were calculated from the initial mass of aluminum and finally the temperature of the room was recorded, leaving only one variable to solve for, R. the corrected value of R was .0694 and the uncorrected value of R was .0711 which is a little off from the actual value of R which is .08206.
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Unformatted text preview: The reason our number was not the exact gas constant is because of the sources of error that could’ve arose in this experiment. Since the amount of NAOH wasn’t measured exactly and when the buret is flipped some slips out causing a possible source of error. In parts B pressure and volume are looked at with everything else constant to see the relationship between volume and pressure. Air is pumped into a pressure reader and the pressure for each volume of air is recorded. The relationship between pressure and volume was found in this experiment to be pressure increases as volume decreases. Part C was similar to part B, however pressure and temperature were looked at instead of pressure and volume. In this experiment a flask is placed in both heat and cold to see the relationship between pressure and temperature. After recording all the data, this experiment determined that as temperature increases pressure increases, and as temperature decreases, pressure decreases....
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Discussion exp 6 - The reason our number was not the exact...

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