To solve this question, we need to use the Clapeyron equation. The Clapeyron equation is a mathematical expression that relates quantities such as pressure (P), volume (V), temperature (T) and the number of particles (n) that make up an ideal gas.
The formula is PV = nRT.
First, let's transform 23.5 grams fo nitrogen gas (N2) into moles using its molar mass and the following formula: moles = mass/molar mass
molar mass of N2 = 28 g/mol
moles = 23.5/28 = 0.839 moles
Now let's use the formula PV = nRT
where:
P = ???
V = 8.5 L
n = 0.839 moles
R = 0.082 atm.L/K.mol
T = 298 K
P x 8.5 = 0.839 x 0.082 x 298
P = 20.51/8.5
P = 2.41 atm
Answer: the pressure is 2.41 atm