A vessel of volume V = 30l contains ideal gas at the temperature 0°C. After a portion of the gas has been let out, the pressure in the vessel decreased by Δp = 0.78 atm (the temperature remaining constant). Find the mass of the release gas. The gas density under the normal conditions ρ = 1.3 g/l.
Let m1 and m2 be the masses of the gas in the vessel before and after the gas is released.
Hence mass of the gas released, Δm = m1-m2
Now from ideal gas equation
(where P0 = standard atmospheric pressure and T0 = 273 K)
From Eqs. (1) and (2) we get
