SATURATION VAPOR PRESSURE INCREASES RAPIDLY WITH TEMPERATURE

COMPARE T(t) FOR SAMPLES WITH DRY AND SATURATED AIR.  REAL-TIME GRAPHICS.

In this demonstration a little water is placed in one beaker.  Both are heated slowly in a water bath.  Sensors read out T and P for each container and these are plotted on the screen. 

Setup the configuration is shown above.  The thermistor controller output is in the form of a cable that connects to the computer interface.  

1. Setup baths and connections ahead of time.
2. Start the computer and run the Data Logging Program
3. Choose MoistVP.plt as the configuration file.
4. Click start to initiate the parametric plot of P(t) vs. T(t) for both samples
5. Turn on the heat to medium.
6. Let the experiment proceed until the cork pops off the wet sample

Sample configuration screen.

Display screen after start has been pressed.  "Stop" would halt the plotting.

The moist P goes up faster than the dry P (exponential vs. linear).  You can see where the experiment "popped".  Temperature is in F.

This experiment is reasonably quantitative.  Can be compared with gas law theory.