Pressure variation of the critical temperature in nitroethane-isooctane and nitroethane-3-methylpentane mixtures

The variation of the critical temperature as a function of pressure in nitroethane-isooctane (N-I) and nitroethane-3-methylpentane (N-3M) mixtures has been experimentally determined. Since both mixtures exhibit components having nearly the same refractive index, special care had to be taken to see the transition. The following values were found : and For N-3M, a comparison is made of the amplitude of the diverging part of the specific heat with the renormalization group prediction.