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use the dry lab data to calculate what your experimental R should be. It should be close to the known value of R that is 0.08206 L atm/ mol K. The calculation help video in the lab folder will Gas Law (Determination of experimental R gas constant va Calibration of ET Real volume (from buret in mL) = 41.29 mL ET Reading = 45.57 mL ET Conversion factor '= Real volume/ ET Reading Determination of R ET Reading Temperature in Celsius Mass of Mg Total Pressure Water vapor pressure Trial 1 39.19 24.5 0.0344 761.22 23.058 Trial 2 40.23 24.5 0.0352 761.22 23.058 TML Celsius 18 torr torr Calibration of ET: Real volume (from buret in mL) ET reading Determination of R: Trial One Trial Two Trial Three ET reading Temperature in deg. C Mass of Mg Total Pressure (from barometer in torr) Water vapor pressure (from appendix) Calculated Data 1L 1000 m2 Determination of the value of R The following equations may also be needed: Equation 4 Volume of H2 gas in Liters (V) = Conversion factor 'f' * ET reading X Equation 5 T (K) = T(C) + 273 Equation 6 Pressure of H, (atm) = (Total Pressure - Vapor Pressure of Water) Use this balanced equation to calculate the moles of H2 (n) Mg + 2HCI MgCl2 + H2 1 atm 760 torr Equation 7 Moles of H2 gas = Mass of Mg x LOL MG 24.31 g Mg mot H4 1 mol Mg Trial One Trial Two Trial Three Real volume of H2 gas in Liters (V) (Equation 4) Temperature in Kelvin (T) (Equation 5) Moles of H2 In, calculated from mass of Mg) (Equation 7) Pressure of H2 (subtract Pwater from Ptotal and convert to atm)(Equation 6) Determined value of R (Equation 2) Average value of R for these three trials Appendix. Vapor Pressure of Liquid Water between 15.0C and 29.9C Temperature (C) 20.0 20.1 20.2 20.3 20.4 20.5 20.6 20.7 20.8 20.9 21.0 21.1 21.2 21.3 21.4 21.5 Temperature (C) 15.0 15.1 15.2 15.3 15.4 15.5 15.6 15.7 15.8 15.9 16.0 16.1 16.2 16.3 16.4 16.5 16.6 16.7 16.8 16.9 17.0 17.1 17.2 17.3 17.4 17.5 17.6 17.7 17.8 17.9 18.0 18.1 18.2 18.3 18.4 18.5 18.6 18.7 18.8 18.9 19.0 19.1 19.2 19.3 19.4 19.5 19.6 19.7 19.8 19.9 Vapor Pressure (torr) 12.833 12.915 12.997 13.080 13.164 13.247 13.332 13.417 13.502 13.588 13.674 13.761 13.848 13.936 14.024 14.113 14.202 14.292 14.382 14.473 14.564 14.656 14.748 14.841 14.934 15.028 15.123 15.218 15.313 15.409 15.505 15.603 15.700 15.798 15.897 15.996 16.096 16.196 16.297 16.399 16.501 16,603 16.706 16.810 16,914 17.019 17.124 17.231 17.337 17.444 21.6 21.7 21.8 21.9 22.0 22.1 22.2 22.3 22.4 22.5 22.6 22.7 22.8 22.9 23.0 23.1 23.2 23.3 23.4 23.5 23.6 23.7 23.8 23.9 24.0 24.1 24.2 24.3 24.4 24.5 24.6 24.7 24.8 24.9 apor Pressure (torr) 17.552 17.660 17.769 17.879 17.989 18.100 18.211 18.323 18.436 18.549 18.663 18.777 18.892 19.008 19.124 19.241 19.359 19.477 19.596 19.715 19.835 19.956 20.078 20.200 20.322 20.446 20.570 20.695 20.820 20.946 21.073 21.201 21.329 21.458 21.587 21.717 21.848 21.980 22.112 22.245 22.379 22.513 22.648 22.784 22.921 23.058 23.196 23.335 23.475 23.615 Temperature (C) 25.0 25.1 25.2 253 25.4 25.5 25.6 25.7 25.8 25.9 26.0 26.1 26.2 26.3 26.4 26.5 26.6 26.7 26.8 26.9 27.0 27.1 27.2 27.3 27.4 27.5 27.6 27.7 27.8 27.9 28.0 28.1 28.2 28.3 28.4 28.5 28.6 28.7 28.8 28.9 29.0 29.1 29.2 29.3 29.4 29.5 29.6 29.7 29.8 29.9 Vapor Pressure (torr) 23.756 23.898 24.040 24.184 24.328 24.472 24.618 24.764 24.911 25.059 25.208 25.357 25.507 25.658 25.810 25.963 26.116 26.270 26.425 26.581 26.738 26.895 27.053 27.213 27.372 27.533 27.695 27,857 28.020 28.185 28.350 28.515 28.682 28.850 29.018 29.187 29.357 29.528 29.700 29.873 30.047 30.221 30.397 30.573 30.750 30.929 31.108 31.288 31.469 31.651