No abstract

No abstract

A determination of the critical exponent δ has been made for the liquid-liquid system, n-decane-β,β' dichloroethyl ether (chlorex). Utilizing schlieren photographs of the system in an ultracentrifuge at a temperature slightly below the critical solution point, the density gradient was obtained as a func tion of radius. These gradients, used in conjunction with sedimentation theory, provided a means for calculating values for the exponent δ. The values thus obtained are consistent with accepted values for the exponents β and γ in two-fluid systems. They are, however, smaller than those found for pure fluids.nrhe behavior of binary solutions near their critical solution point has been studied extensively in centrifugal fields (1,2,3).This behavior is similar to that of a pure component at its gas-liquid critical point, now known to be governed by exponential relations of the form . r din ι r-7el /H \ where ξ is the critical exponent for property Y as the critical temperature is approached (4). The critical isotherm is described by «-lim^ff-ff (2) v + vc din (V -Vc)