Latent

From Physlab.lums.edu.pk

Latent Heat of Vaporization of Liquid Nitrogen and Specific Heats of Metals (1.7)

Students Manual	In this experiment, we have used a simple and intuitive setup to measure the latent heat of vaporization of liquid nitrogen and the specific heat capacity of a material. We will learn about the thermal properties of materials including solids, liquids and gases. Furthermore, we will be exposed to the safe handling of cryogens that are routinely used in low temperature physics.
Labview Code	Latent heat
Sample Results	Latent Heat for Liquid Nitrogen
Further Readings and References	"A simple method of determining Debye temperatures", C. G. Deacon, J. R. de Bruyn, J. P. Whitehead American Journal of Physics, 60(5), 422-25 (1991). "Latent heat and low temperature heat capacity measurement for the general physics laboratory", C. W. Thompson and H. W. White, American Journal of Physics, 51(4), 362 (1983). Experimental determination of heat capacities and their correlation with quantum predictions, W. Mahmood, M. S. Anwar, and W. Zia, American Journal of Physics, 79, 1099 (2011).

1. Provided apparatus	2. Safety precaution while handling liquid nitrogen
3. Circuitry of the setup	4. Configuring the Mass balance
5. Setup for measuring the background loss	6. Pouring the liquid nitrogen into the styrofoam cup
7. Make sure the resistor is fully immersed	8. How to set the output path and and run the Labview file
9. Turn ON te variac. Set the voltage at 22V. Don't operate it above 25V