Gas Behavior Lab - Calculations This calculation was used...

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Gas Behavior Lab Parker Ashbaugh T.A. Yisheng Xu 4/19/07 Lab 104A Sec 45 Abstract
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Introduction In this lab we are to use a real gas with the help of the Ideal Gas Law to determine Rydberg’s constant, R. The Ideal Gas Law states: PV= nRT, where P is pressure, V is volume, n is the number of moles of gas, T is temperature and R is a constant. R can be calculated by measuring and gathering the other variables values. An ideal gas is one that occupies no volume and whose molecules don’t interact. Real gases don’t fit this definition but they are all close. Therefore we are going to compare the constant we calculate with the Ideal Gas Law constant. To do this, a liquid will be heated into a gas and its properties will be measured. Then these values will be plugged into the equation to solve for R. It is already known that our calculated value for R will not be the exact same as the real constant, but it should be somewhat similar.
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Unformatted text preview: Calculations This calculation was used to determine the number of moles of gas in the flask. Moles of gas = mass of gas/ molecular weight of gas Moles of gas = This calculation was used to determine the experimental gas constant, R. PV = nRT or R= PV/nT This calculation was used to find the average R value. Average R value = R1 + R2 + R3/ 3 Average R value = The last calculation was finding the standard deviation. Standard Deviation = √(Ra – R1) 2 + (Ra – R2) 2 + (Ra – R3) 2 / 3-1 (Ra stands for Average R) Standard Deviation = Results This table shows all the measured and calculated values for the three separate trials. Trial 1 Trial 2 Trial 3 Overall Moles of gas (mol) Gas Constant (R) (L atm/ mol K) Average R (L atm/ mol K) Deviations Standard Deviation Deviation of Average from Ideal Discussion...
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