DENSITIES OF LIQUID CH4 - aXa(X equals Br,I) AND CH4 - (a + b + c + d)FaCIbBrcId HALOMETHANES.

The available density data for the air-saturated liquid and for the liquid at its saturation vapor pressure have been critically reviewed and the ″best″ data selected for the following halomethanes: CHF//2Cl, CHFCl//2, CF//3Cl, CF//3Br, CF//2Cl//2, CFCl//3, (data up to the critical point are available for these compounds); CH//3Br, CH//2Br//2, CHBr//3, CBr//4, CH//2I//2, CH//2FCl, (data up to the normal boiling point are available for these compounds); CHCl//2Br (data over a small temperature range); CHI//3, CI//4, CH//2Fl, CH//2ClBr, CH//2CH, CHF//2Br, CHF//2I, CHFBr//2, CHFI//2, CHCl//2I, CHClBr//2, CHClI//2, CF//3I, CF//2Br//2, CFBr//3, CCl//3Br, CCl//3I, (few scattered data points are available for these compounds). The literature survey is complete up to June 1974. Selection of ″best″ data was arrived at by carefully evaluating each set of data for its accuracy, method of experimentation, sample purity, etc. The selection procedure is discussed. The uncertainty in the selected values is reported. For interpolation and limited extrapolation, the selected density data for each compound have been correlated through simple equations in temperature. The regression errors and the computed regression constants are reported in tables 2 and 4, respectively.