| 1. | |
2. | |
| A balloon is filled with liquid nitrogen and tied | The liquid nitrogen evaporates and expands | ||
| 3. | |
4. | |
| The balloon continues expanding... | ...until it breaks |
| 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. |
