Page 1 :
PROBLEMS [ZU 7 va TT, , <M. 38-0 mL of moist nitrogen were collected at 27°C and 0:98 bar pressure. Calculate the volum, tension at 27°C is 0-035 bar. © of the gas at N.T.P. Aqueous, , : : : [Ans, 32-2, «25, A given mass of gas occupies 919-0 mL in dry state at N.T.P. The Same mass when collected over water at ra fa, bar pressure occupies one litre volume. Calculate the vapour pressure of water at 15°C. noe?, , " [Ans. 0-005 bar, ‘26, What is the pressure exerted by a mixture of 3-5 8 of nitrogen and 2 g of helium when confined in a vessel o:, , f volume 40 litres, , at 0°C ? ; [Ans. 0-354 bar], , ‘2°, A 10 L flask at 298 K contains a gaseous mixture of CO and CO) at a total pressure of 2-0 bar If 0-20 mole of CO is, present, find its partial pressure and also that of CO. [Ans. Poo = 0-495 bar, Pcoz = 1-505 bar], , “28. A dry gas occupies 127 mL at N.T.P. If the same mass of the gas is collected over water at 23°C and a total pressure of 0-98, bar, what volume will it occupy ? The vapour pressure of water at 23°C is 0-028 bar. [Ans. 146-52 mL}, , ‘25. An open vessel contains air at 27°C. Calculate the temperature to vapours which air should be heated so that 1/3rd of its, volume measured at 27°C escapes out. [Ans. 177°C), , ‘*“). A 10 litres flask contains 0-2 mole of methane, 0-3 mole of hydrogen and 0-4 mole of nitrogen at 25°C. What is the partial, pressure of each component and what is the total pressure of the gaseous mixture ?, [Ans. pCHg = 0-489 atm, pH = 0-734 atm, pNz = 0-979 atm, Proai = 2202 ~, At 25°C and 760 mm of Hg pressure, a gas occupies 600 mL volume. What will be its pressure at a eS dle, temperature is 10°C and volume is 640 mL ? (ALP. nop orate ral tal, 1. The volume of 0-0168 mol of O, obtained by the decomposition of KCIO; and collected by the Se 6m Hl, at pressure of 754 mm Hg at 25°C. What is the pressure of water vapours at 25°C ? fe, , On ——<———, , 153, , ®