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Calculate the total pressure in a 10 litre cylinder which contains 0.4 g He, 1.6g oxygen & 1.4 g of nitrogen at 300k assume ideal behavior for gases. A. 0.492 atmp B. 0.246 atmp C. 0.692 atmpD. Non of these Calculate the total pressure in a 10 litre cylinder which contains 0.4 g He, 1.6g oxygen & 1.4 g of nitrogen at 300k assume ideal behavior for gases. A. 0.492 atmp B. 0.246 atmp C. 0.692 atmpD. Non of these
PV = nRT V = 10 litre T = 27ºC = 300KnHe = 0.4/4 = 0.1 N2 = 1.4/ 28= 0.05, O2 = 1.6/32= 0.05Total no. of moles = 0.1 + 0.05 + 0.05 0.2PV = nRT P× 10 = 0.2 × 0.082 × 300 = 0.04926 P = 0.492 atmPartial pressure = Total pressure × molefractionPHe = 0.492 × 0.1/ 0.2 = 0.246 atmPN2 = 0.492 × 0.05/ 0.2 = 0.123 atmPO2 = 0.492 × 0.05/0.2 = 0.123 atm
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