The effective heat capacity of a mixture of gases is given by:

where Cp is in Btu$/($lb$.$

$0$

F$)$ and t is in $0$

F$.$ Change the equation into the form in

which Cp is given in kJ$/$kg$.$K and temperature in K$.$

$(8)$

b A benzene solution of an organic compound A analyses $10\%$ A$.$ The molality

of solution is $0\mathrm{.}62.$ Calculate: $($i$)$ The molecular weight of compound A and $($ii$)$

the mole fraction of the compound A in the solution.