The problem is incomplete. However, there can only be two probable questions for this problem. First, you can be asked the individual partial pressures of each gas. Second, you can be asked the volume occupied by each gas. I can answer both cases for you.
1.
Let's assume ideal gas. Pressure for N₂: 2 bar*0.4 = 0.8 bar Pressure for CO₂: 2 bar*0.5 = 1 bar Pressure for CH₄: 2 bar*0.1 = 0.2 bar
2. For the volume, let's find the total volume first.
V = nRT/P = (1 mol)(8.314 J/mol-K)(30 +273 K)/(2 bar*10⁵ Pa/1 bar) V = 0.0126 m³ Hence, Volume for N₂: 0.0126 bar*0.4 = 0.00504 m³ Volume for CO₂: 0.0126*0.5 = 0.0063 m³ Volume for CH₄: 0.0126*0.1 = 0.00126 m³
There are many examples of chemical equilibrium all around you. One example is a bottle of fizzy cooldrink. In the bottle there is carbon dioxide (CO2) dissolved in the liquid. There is also CO2 gas in the space between the liquid and the cap
