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Behavior of Gases
Pedagogical Overview: Before and After Electronic Data Acquisition With MeasureNet
| Experiment | Before MeasureNet | After MeasureNet |
| Behavior of Gases | Not carried out. N.B., the follow-on experiment mentioned at the right was performed with a mercury manometer connected to a side-arm flask. It was difficult to obtain good results, and using a mercury has obvious disadvantages. |
Students use the pressure sensor to determine the pressure-volume and pressure-temperature behavior of air. In a follow-on experiment, students make pressure-temperature measurements to determine the enthalpy of vaporization of a volatile compound. Two sets of pressure-temperature measurements are made. The first is for a sample of air alone. The second is for the same sample of air after a small amount of the volatile liquid is injected through a rubber septum. The data are combined to find the vapor pressure of the volatile liquid alone, as of function of temperature, and thus the enthalpy of vaporization. |
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