Using a Force Sensor to Measure Vaporization of Liquid Nitrogen

The philosophy of the present task is derived from Experiment 1.7 except that the vaporization will be measured using a force sensor (instead of a mass balance). See Fig. 1. Use the provided software (Logger Lite) to connect to the force sensor through the provided interface. Record the mass loss of liquid nitrogen as a function of time. Then systematically supply energy to the liquid using a heating filament. Measure the power delivered to the heater and the duration of heating. Switch the heater off, and allow the nitrogen to re-establish its natural background vaporization rate. Plot the mass loss and use it to determine the latent heat of vaporization.