Question

A scientist is preparing an experiment. She needs to collect 10 moles of helium gas in a 7.5-liter container before he can begin. The gas temperature inside the helium container will be a constant 20 degrees C. The scientist wants make sure that the pressure exerted by the helium will not burst the gas container. What would be the pressure of the helium gas inside the container?

Answer 1

Answer : The pressure of the helium gas inside the container would be, 32.1 atm

Explanation :

To calculate the pressure of the gas we are using ideal gas equation as:

$PV=nRT$

where,

P = Pressure of $He$ gas = ?

V = Volume of $He$ gas = 7.5 L

n = number of moles $He$ = 10 mole

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of $He$ gas = $20^oC=273+20=293K$

Putting values in above equation, we get:

$P\times 7.5L=10mole\times (0.0821L.atm/mol.K)\times 293K$

$P=32.1atm$

Thus, the pressure of the helium gas inside the container would be, 32.1 atm