Liquid Nitrogen I

1.A balloon is filled with liquid nitrogen and tied 2.The liquid nitrogen evaporates and expands
A balloon is filled with liquid nitrogen and tied The liquid nitrogen evaporates and expands
3.The balloon continues expanding... 4....until it breaks
The balloon continues expanding... ...until it breaks
Animation of Experiment (GIF Format, 450 k)
Animation of Experiment (MPG Format, 498 k)

Photo 1:Experimental setup: A balloon is filled with liquid nitrogen and tied off.
Photo 2, 3:The liquid nitrogen evaporates. 28 g liquid nitrogen has a volume of 34.68 cm3 at -196 C. Under normal conditions as a gas, the same amount has a volume of 22.4 liter, approximately 650 times greater.
Photo 4:In the end, the balloon bursts.
Exercise 8.5.3.1:
Solution
How many kg nitrogen (assuming an ideal gas) are in a gas flask with a volume of 120 liter, a pressure of 121.6 kPa and a temperature of 25 C?
Aufgabe 8.5.3.2:
Solution
The following relationship exists between the pressure and volume of a gas and the average temperature of the gas molecules:

p×V = 1/3×n×M×v2

Calculate the average spead of N2 molecules in the air at a temperature of 0 C.

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