(A)(i) List three main differences between real gases and ideal gases (3 marks)
(ii)State the principle of corresponding states.(1 mrk)
(B) For ethane, Pc=48.2 atm and Tc=305.4K. calculate the pressure exerted by 74.8g of C2H6 in a 200 cm3 vessel at 37.5OC using
i)the ideal gas law .(3mrks)
ii)the van der waals equation (4mrks)
iii)comment on the values from (i) and (ii) (1 mrk)
(C) use the virial equation of state to show that for a real gas ;
lim-(P?o)?¦((?-?id)@)=B(T) (3mrks)
(D)Calculate z from the van der waals equation with a =5.464 L2 atm mol-2 and b=0.03049Lmol-1 at 776.4K for water vapour at 327.6 atm given that its density is 133.2gL-1.
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