Question

A 12-liter tank contains helium gas pressurized to 160 .

How many 3-liter balloons could the 12-L helium tank fill? Keep in mind that an "exhausted" helium tank is not empty. In other words, once the gas inside the tankreaches atmospheric pressure, it will no longer be able to fill balloons.

Please provide explanation and answer.

Answer 1

640

Answer 2

In the question they couldn't mension the pressure of helium tank containing 12 L of gas.

If we know that the pressure of the gas tank , then by Boyle's law

PV = P'V'

Where P = initial pressure

P' = final pressure = atmospheric pressure = 1atm

V = initial volume = 12 L

V' = final Volume = ?

Plug the values we get V' = PV / P'

= 12* P L

So at 1 atm, there are 12P L of the gas

Therefore, a 12L tank will reach 1 atm when there are 12 L of gas in it.

 

You we end up with (12P - 12 ) L of gas to work with and have to fill 3-Liter balloons,

so (12P - 12 ) L / 3 balloons to be filled.