Question

2 × 10⁶ molecules of N₂ gas enter into the vessel having volume 400 ml at 127° C temperature. Find the pressure of N₂ gas.

Answer 1

To calculate the pressure in the Nitrogen Gas (N2), you need the formula,  

P(N2) * V = n(N2) * R * T

Hence,  

P(N2) = n(N2) * R * T / V

Here,  

n(N2) = 2 * 10^6

Volume (V) = 400 ml

Temperate = 127 degree C = 400.15 K

Hence, P(N2) = 2 * 10^6 * 0.08206 * 400.15 / 400