pper that is removed for a brief moment and then replaced. The gas in the carboy will momentarily reach atmospheric pressure, and then reside to it’s initial temperature, at which time the pressure is recorded again. It is necessary to record the atmospheric pressure at the time of the experiment. Three trials were run on each gas to obtain the following data. The pressure transducer used here was an open tube manometer containing dibutyl phthalate, so the pressure readings were converted to mmHg before used in calculations. GasTrialP1(mmdi-but.)P1 (mmHg)P3(mmdi-but.)P3 (mmHg)Ar115577360.0766214577360.0766324078050.0765N2127078255.0766241079390.0768315077333.0764CO214807981107702710816350788325578158.0766Barometric Pressure: 761.5 mmHgRaw data was converted to mmHg by multiplying the recorded pressures by (1.046g/cm3)/(13.55g/cm3). Results:In order to calculate heat capacity ratios from the raw data it is necessary to treat this adiabatic expansion as being reversible. Upon quickly releasing the stopper, the upper and lower portions of gas form an imaginary surface between them, in which the lower portion pushes reversible against the upper portion. Work is done by the lower portion of the gas pushing the upper portion out of the carboy. The relationship, = ln(P1/ P2)/ln(P1/ P3)can be derived where P2 is the barometric pressure at the time of the experiment. ExperimentalTheoreticalGasTrial(average)(with vibrational contributionsAr11.6521.6531.241.651.6667N211.2921.2731.281.271.40001.3333CO211.3121.9831.301.301.40001.2222 The entries that are not highlighted were left out of the average since they lack precision. This discrepancy will be attributed to uncertainties in the experimental procedure.Conclusion:The experimental setup applied is questionable, but it does produce a reasonable system for study. The process is considered adiabatic because it is rapid and no appreciable amount...
