Report Essay-Sample

This appendix presents the data, calculations, and graphs from the experiment to verify the ideal gas equation. The first two columns of Table A-1 show the measured voltages from the pressure transducer and the temperature transducer. Column three shows the measured values of pressures calculated from the following calibration curve for the pressure transducer:

p = 4.3087(V·V) - 13.1176V + 10.7276
where V equals the voltage output (volts) from pressure transducer, and p equals the absolute pressure (kPa). Column four presents the measured values of temperature (K) calculated from the calibration curve for the thermocouple:

T = Tref + V/S
where Tref equals the ice bath reference temperature (0°C), V equals the voltage (volts) measured across the thermocouple pair, and S equals the thermocouple constant, 42.4 µV/°C. Finally, column 5 presents the ideal values of temperature for the corresponding measured values of pressure. These ideal values arise from the ideal gas equation (PV=mrt). Figure A-1 shows the graph of temperature (K) versus pressure (kPa) for the measured case. Figure A-2 shows the graph of temperature versus pressure for the ideal case.

Table A-1.Data From Experiment

Voltagepres (V) Voltagetemp (V)Pressuremeas (kPa)Temperaturemeas (K)Temperatureideal (K)
6.32 0.0011 99.90 298.94 312.17
6.39 0.0020 102.81 320.32 321.28
6.78 0.0031 119.82 346.26 374.44
7.31 0.0046 145.04 381.64 453.24
7.17 0.0052 138.14 395.79 431.69
7.35 0.0064 147.04 424.09 459.50
7.45 0.0073 152.11 445.32 475.32
7.56 0.0078 157.78 457.11 493.04
7.66 0.0097 163.02 501.92 509.43
8.06 0.0107 184.86 525.51 577.69
8.10 0.0114 187.12 542.02 584.75
8.34 0.0130 200.97 579.75 628.03

Figure A-1. Temperature versus pressure, as measured by the transducers.


Figure A-2. Temperature versus pressure, as calculated from the ideal gas equation.

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