4. A mixture of 1 mole CO, and 3.5 moles of air is contained in a vessel at 1 bar and 15°C. The volumetric analysis of air can be taken as 21% oxygen and 79% nitrogen. Calculate for the mixture : (i)...

Pls answer only the sub part (iv)

Extracted text: 4. A mixture of 1 mole CO, and 3.5 moles of air is contained in a vessel at 1 bar and 15°C. The volumetric analysis of air can be taken as 21% oxygen and 79% nitrogen. Calculate for the mixture : (i) The masses of CO, 0, and N, and the total mass. (ii) The percentage carbon content by mass. (iii) The apparent molecular weight and the gas constant for the mixture. (iv) The specific volume of the mixture. [Ans. (i) 44 kg, 23.55 kg, 77.5 kg ; (ii) 8.27% ; (iii) 32.2, 0.2581 kJ/kg K ; (iv) 0.7435 m³/kg] na of