Phenomena of mixing Ethylene Glycol /Water System for Freezing Point Measurements

      Experimental work is carried out to find the minimum value of freezing point that can be obtained for Ethylene Glycol – water solution. 5% wt. of methanol is added to the Ethylene glycol – water solution to investigate its effect on freezing temperature.The experiments also included determination of boiling temperature of Ethylene Glycol – water solution with and without methanol at different ethylene glycol concentrations from 0 to 100 weight per cent at temperature 20°C and 1 atmosphere pressure. The results revealed that increasing Ethylene Glycol percent from 0 to 55% leads to decrease in the freezing point. Above 80% the Ethylene Glycol cause a rise in freezing temperature. Also the presences of 5% methanol decreases the freezing temperature for all values of ethylene glycol percents, while it causes little increase in the boiling temperature.The freezing point and the boiling point that were measured experimentally are substituted in Lielmezs model to obtain the reduced temperature (T*):