Excess contribution ethane

The evaluation of the excess contribution to the thermal conductivity of carbon dioxide-ethane mixtures has been performed by a route parallel to that employed for the viscosity. Again, that route has been described in detail in Section 5.5.1.2 so that here it is merely recorded that for pure carbon dioxide and pure ethane the thermal conductivity has been taken from the work of Vesovic et al. (1990, 1994). All other quantities required for the calculation are the same as those employed for the zero-density thermal conductivity. In this context it should be noted that the Thome-Enskog equations employed for these calculations have, as their zero-density limit, the Hirschfelder-Eucken result in the form of equation (15.5). Figure 15.3 contains the pseudo-radial distribution functions for carbon dioxide and ethane determined... 

Koga has shown that by using diphenylmethane and 1,2-diphenyl-ethane, modest yields of the p,/ -disubstituted products also can be obtained. Since the reaction was run using excess AICI3 and the yields are modest, one wonders about the contribution by products analogous to 133. Among the solvents tried were chlorinated hydrocarbons, CS2, and nitrobenzene. The best yields were obtained using 1,2-dichloroethane. 

As was pointed out earlier, there are no published thermal conductivity data for the carbon dioxide-ethane system in which either the excess or the background contribution have been unequivocally identified. Consequently, no comparison with experiment is yet possible. 

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