### Solubility System: Nitroethane with Methylcyclohexane (Original Report)

_{2}H

_{5}NO

_{2}; [79-24-3] NIST Chemistry WebBook

(2) Methylcyclohexane, C

_{7}H

_{14}; [108-87-2] NIST Chemistry WebBook

*w*

_{1}= Mass Fraction (Component 1)

*x*

_{1}= Mole Fraction (Component 1)

^{1}determined the upper critical solution temperature. Clever

*et al.*

^{2}measured the mutual solubilities of the two components between 282 and 298 K by the synthetic method. Pyzuk

*et al.*

^{3}determined the upper critical solution temperature by the synthetic method and the critical solution composition.

The upper critical solution temperature has been reported as 294.5 K,

^{1}295.2 K ,

^{3}and 298.2 K.

^{2}The corresponding critical solution composition has been reported as Ø

^{*}

_{cl}= 0.346,

*x*

_{c1}= 0.486.

^{2}The experimental data reported in Clever

*et al.*

^{2}and Pyzuk

*et al.*

^{3}have been approximated (with the same weighing factor) by an equation based on the scaling law (described in the preface to this volume) for which the following parameters were derived:

*a*_{1} = 0.76790, *a*_{2} = 0.64079, *b*_{1} = -2.48127, *b*_{2} = 1.78400,
(mean standard error of estimate was 0.0183).

For this approximation UCST and *x*_{cl} from Clever *et al.*^{2} and Pyzuk *et al.*^{3} were used respectively. In the opinion of the evaluator, the smoothed mutual solubilities, calculated by this equation, may be treated as tentative. The results of calculations for the selected temperatures are presented in Table. This relationship together with experimental points (Clever *et al.*^{2}) are also presented in Fig. 6.

T (K) | w_{1} | x_{1} |
---|---|---|

283.2 | 11.5 x 10^{-2} | 0.145 |

288.2 | 16.0 x 10^{-2} | 0.2 |

293.2 | 22.0 x 10^{-2} | 0.27 |

294.2 | 23.5 x 10^{-2} | 0.287 |

295.2 | 25.4 x 10^{-2} | 0.308 |

296.2 | 27.5 x 10^{-2} | 0.332 |

297.2 | 30.5 x 10^{-2} | 0.365 |

297.5 | 31.8 x 10^{-2} | 0.379 |

297.6 | 32.4 x 10^{-2} | 0.385 |

297.7 | 32.9 x 10^{-2} | 0.391 |

297.8 | 33.6 x 10^{-2} | 0.398 |

297.9 | 34.3 x 10^{-2} | 0.406 |

298.0 | 35.3 x 10^{-2} | 0.416 |

T (K) | w_{1} | x_{1} |
---|---|---|

283.2 | 78.5 x 10^{-2} | 0.827 |

288.2 | 72.9 x 10^{-2} | 0.779 |

293.2 | 65.5 x 10^{-2} | 0.713 |

294.2 | 63.5 x 10^{-2} | 0.695 |

295.2 | 61.3 x 10^{-2} | 0.674 |

296.2 | 58.5 x 10^{-2} | 0.648 |

297.2 | 54.7 x 10^{-2} | 0.612 |

297.5 | 53.1 x 10^{-2} | 0.597 |

297.6 | 52.5 x 10^{-2} | 0.591 |

297.7 | 51.9 x 10^{-2} | 0.585 |

297.8 | 51.0 x 10^{-2} | 0.577 |

297.9 | 50.2 x 10^{-2} | 0.569 |

298.0 | 49.1 x 10^{-2} | 0.558 |

(1) Francis, A. W. ; Critical Solution Temperatures. Adv. Chem. Ser. 31 (1961).

(2) Clever, H. L. ; Pirkle, Q. R. Jr. ; Allen, B. J. Jr. ; Derrick, M. E. ; J. Chem. Eng. Data 17, 31-4 (1972).

(3) Pyzuk, W. ; Krupkowski, T. ; Dolecki, J. ; Paduszek, B. ; Pol. J. Chem. 56, 1477-82 (1982).