Question

To an evacuated vessel movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of an unknown compound ( vapour pressure 0.68 atm, at `0^(@)C`) are introduced. Considering the ideal gas behaviour , the total volume ( in litre) of the gases at `0^(@)C` is close to

Answer 1

Correct Answer - 7
`P_(He)=1-0.68=0.32 atm`
`V=?`
`n=0.1, V= (nRT)/(P) = (0.1 xx 0.0821 xx 273)/(0.32)= 7`