3. A rigid cylinder is fitted with a movable piston. The cylinder contains a sample of helium gas,
He(g), which has an initial volume of 125.0 milliliters and an initial pressure of 1.0 atmosphere, as
shown below. The temperature of the helium gas sample is 20.0°C.
-Handle
Movable
piston
-150.0 mL
125.0 mL
1,0 2.0
3.0
Pressure
gauge
-100.0 mL-
ATM
-75.0 ml-
Rigid
cylinder
50.0 mL
-25.0 mL-
a.) Express the initial volume of the helium gas sample, in liters.
b.) The piston is pushed further into the cylinder. Show a correct numerical setup for calculating the
volume of the helium gas that is anticipated when the reading on the pressure gauge is
1.5
atmospheres. The temperature of the helium gas remains constant.
c.) Helium gas is removed from the cylinder and a sample of nitrogen gas, N2(g), is added to the
cylinder. The nitrogen gas has a volume of 125.0 milliliters
and a pressure of 1.0 atmosphere
at
20.0°C. Compare the number of particles in this
nitrogen gas sample to the number of particles
i
the original helium gas sample.