How many balloons can a cylinder of helium fill?
For example, a cylinder of 40L helium gas with a pressure of 10MPa
A balloon is about 10L, the pressure is 1 atmosphere and the pressure is 0.1Mpa
40*10/(10*0.1)=400 balloons
The volume of a balloon with a diameter of 2.5 meters = 3.14 * (2.5 / 2) 2 = 4.90625 square meters = 4906.25 liters
Under standard conditions, 1mol of gas is 22.4 liters, so a total of 4906.25/22.4=about 219mol is required, so about 219mol of helium is needed, so 219mol*4g/mol=876g of helium is needed
How long can a helium balloon last?
How long a helium balloon can be stored is closely related to the temperature.
Here is an example of a 10-inch helium balloon. Generally, a 10-inch helium balloon lasts about 5 hours. Of course, the holding time is uncertain. If the helium balloon is kept in a lower temperature environment, the holding time is longer, such as an air-conditioned room, in such an environment, it can generally be kept for 7 hours. This depends on the temperature.
Special attention should be paid to outdoor use: please avoid sunlight as much as possible before the start of the activity. The balloon will not be shiny after sunlight, that is, “oxidation” is affected by the temperature, and the life span of the helium balloon is greatly reduced.
If you can’t avoid direct sunlight with helium balloons, you must pay special attention to the helium balloons under sunlight. Generally speaking, they can only last for 4 hours. If it is summer, the light is relatively strong, and it is difficult to maintain it for 4 hours. Therefore, you must pay attention to budget time when doing activities.
Post time: Dec-29-2021
