INVESTIGADORES
BEKERIS Victoria Isabel
artículos
Título:
Cooling balloons with liquid Nitrogen, accepted July 2010
Autor/es:
A. MORENO; H. FERRARI; V. BEKERIS
Revista:
AMERICAN JOURNAL OF PHYSICS
Editorial:
AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS
Referencias:
Año: 2010
ISSN:
0002-9505
Resumen:
We present an undergraduate level experiment where the radius of a rubber balloon is measured as it is cooled with liquid nitrogen. It is found that for balloons filled with simple condensable gases, the volume drops linearly with time. We compare our measurements with a simplified model derived from elementary statistical mechanics and thermodynamics that explains satisfactorily this behavior. Students are encouraged to test the validity of the model by repeating the experiment using either gas mixtures or non condensable gases.
