HOW TO INCREASE SIG FIGS IN EXCEL TRENDLINE MANUAL
Measured temperatures were related to vapor pressures by substituting our values of T into the equations given in Table 12.1 (page 26) of the lab manual for our three organic liquids (heptane, octane and nonane). Use that slope and values of n and T to solve for R. For example, a slope of the graph of Pressure vs Inverse Volume (1/V) will give you a slope = to "PV" from the ideal gas equation. Substitute your values from your slope and other variables. Re-arrange the Ideal Gas Law to fit this slope. We found the density of air at room temperature and used it to to find the number of moles in 5 mL of air. Even though we increase the volume of the container (syringe) the moles of air were still the same. 5 mL are used to find the number of moles which was a constant. n= # of moles of air found and T = room temperature in K. a plot of air pressure versus inverse volume and using the slope from the linear regression we found the value of R. density was then used to find the number of moles of air in the syringe. created a plot of density of air versus temperature and using the slope from the linear regression we found the density of air at room temperature.
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