Calculate the density of N2 gas at a pressure of 1.25atm and a temperature of 43oC * 2.36 g/L 0.76 g/L 7.21g/L 1.34 g/L

Question

Calculate the density of N2 gas at a pressure of 1.25atm and a temperature of 43oC *

1) 2.36 g/L

2) 0.76 g/L

3) 7.21g/L

4) 1.34 g/L

Answer 1

Calculate the density of N2 gas at a pressure of 1.25atm and a temperature of 43oC * 2.36 g/L 0.76 g/L 7.21g/L 1.34 g/L

Start with PV = nRT and solve for n/V to get n/V = P/RT. This result is in moles N2 gas per liter, but we are looking for density in g /L. We must multiply the n/V result by the molecular mass of N2 which in round numbers is 28 g/mole.

Rounded to two decimal places, I got 1.35 g/L which is close to the 1.34 g/L result.

Use R = 0.082, T = 316 K, P = 1.25 atm.