HOMEWORK II

$($Due Date: $22\mathrm{.}05\mathrm{.}2024,17$:$00$ pm$)$

The tables given below give the mean flow times $t$ in a suspended level viscometer recorded

for solutions of two of the five monodisperse samples of polystyrene at various concentrations

in cyclohexane at $34C.$ Under these conditions, the mean flow time to for cyclohexane is

$151\mathrm{.}8$ s$.$ Determine the intrinsic viscosities $$ samples B and E$.$

The intrinsic viscosities of other three polystyrene samples were evaluated under the same

conditions and given in the following table together with the weight$-$average molar mass

values determined by light scattering. Using these data together with the calculated values of

$$ for samples B and E$,$ evaluate the constants of the Mark$-$Houwick equation for polystyrene

at $34C.$