A steel tank has a volume of 40.0L and is stored at 25C.When it is full it contains 3.3 moles of gas. What is the pressure in this tank when it’s full

Answer 1

V = 40.0 L

T = 25C + 273 = 298 K

n = 3.3 moles

P = ?

Ideal gas law: PV = nRT and solving for P, we have...

P = nRT/V = (3.3 moles)(0.0821 L-atm/Kmol)(298K)/40.0 L = 2.1 atmospheres (2 sig. figs.)