# Measuring the weight of gas in an inflated balloon

• prashantakerkar
In summary, the method for measuring the weight of gas in an inflated balloon involves calculating the mass of the balloon and subtracting it from the total weight of the balloon while it is floating in the atmosphere. This involves knowing the volume of the balloon, the density of the surrounding air, and the weight of the deflated balloon. The equation for this calculation is tare = B - VA, where tare is the weight measurement and B, V, and A are the known variables. However, it should be noted that the weight measurement can be affected by the gas composition and other factors.

#### prashantakerkar

What could be the method for measuring weight of gas in inflated balloon?

Thanks & Regards,
Prashant S Akerkar

To calculate the mass of the gas in the balloon, you will need to know:
1) V: The volume of the balloon.
2) A: The density of the ambient air (roughly 1.24 Kg/M^3)
3) B: The mass of the balloon itself (when deflated).
4) M: The mass as of the balloon as measured (positive or negative) as it floats in the atmosphere.

So your tare will be the volume of B-VA. That should be subtracted from the weight measurement.

prashantakerkar said:
What could be the method for measuring weight of gas in inflated balloon?

Thanks & Regards,
Prashant S Akerkar

Are you trying to determine the weight of the gas in the balloon or its mass?

Thanks.

Weight of gas in the balloon.

Any mathematical equation derived for the same?

Thanks & Regards,
Prashant S Akerkar

prashantakerkar said:
Weight of gas in the balloon.

what is the gas ?
that will directly affect the results

Thanks.

The air which we inflate the balloon with pump or mouth.

Air constitutes 80% Nitrogen, 18% Oxygen, some % of Carbon dioxide, inert gases.

How we can calculate the weight of the gas (air) for the inflated balloon?

Any mathematical equation derived for the same?

Thanks & Regards,
Prashant S Akerkar

Thanks.

To illustrate,

http://www.ekataweighingmachines.com/gas.html

Measuring the weight of the gas cylinder before inserting the Lpg gas and then measuring the weight of the gas cylinder after the gas is filled in the cylinder.

Now how to measure the weight of the gas (air) filled up in the inflated balloon by air pump or by mouth?

Thanks & Regards,
Prashant S Akerkar

Thanks.

The above is a example of LPG gas filled in cylinder.
Cylinder has weight calculated before inserting LPG gas.
Cylinders total weight is calculated after LPG gas is inserted.

Similarly can we calculate the weight of balloon before the air (gas) is added?

Similarly can we calculate the weight of balloon after the air (gas) is added?

What will be the weight of the gas filled in the inflated balloon?

Any mathematical equation derived for the same?

Thanks & Regards,
Prashant S Akerkar