Ethylene glycol solutions freezing points

Ethylene glycol as an antifreeze The process of adding a solute to water also lowers the temperature at which water freezes. The number of degrees the freezing point is lowered is proportional to the number of solute particles dissolved in the water. Any solute added to water decreases its freezing point. A solution with a low freezing point, such as an ethylene glycol solution in a car radiator, is less likely to freeze in winter. 

Table 7.59 Freezing Points of Aqueous levo-2,3-Butanedlol-Ethylene Glycol Solutions (32)...

EXAMPLE 13.9 Freezing Point Depression Calculate the freezing point of a 1.7 w ethylene glycol solution. ... 

An ethylene glycol solution contains 21.2 g of ethylene glycol (C2H6O2) in 85.4 mL of water. Calculate the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)... 

Fig. 2. Freezing points of aqueous glycol solutions. A, ethylene glycol B, diethylene glycol C, triethylene glycol and D, tetraethylene glycol. Ethylene glycols...

Pure ethylene glycol freezes at —I2,7°C, Exact composition and temperature for eutectic point are unknown, since solutions in this region turn to viscous, glassy mass that makes it difficult to determine the true freezing point. For the concentrations lower than eutectic, ice forms on freezing, while on the concentrated, solid glycol separates from the solution. 

Figure 11-16. Freezing points of aqueous solutions of ethylene and propylene glycol. (Used by permission 1977ASHRAEHandbook, l-P Ed., Fundamentals, 1979 ASHRAE Handbook and Product Directory, 1979,1980 2"= printing, American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. All rights reserved.)...

An antifreeze solution is prepared containing 50.0 cm3 of ethylene glycol, C2H602 (d = 1.12 g/cm3), in 50.0 g of water. Calculate the freezing point of this 50-50 mixture. 

You take advantage of freezing point lowering when you add antifreeze to your automobile radiator in winter. Ethylene glycol, HO(CH2)2OH, is the solute commonly used. It has a... 

Ethylene glycol is traditionally associated with use as permanent-type antifreeze for internal-combustion engine cooling systems. Other uses include the production of polyesters for fibers, films, and coatings, in hydraulic fluids, in the manufacture of low freezing-point explosives, glycol ethers, and deicing solutions. 

The freezing-point depression of a 32% by weight aqueous solution of ethylene glycol is 16.23°C. What is the activity coefficient of water in this solution ... 

For example, if we add 275 g of ethylene glycol (molecular weight 62.0) per 1000 g of water in a car radiator, what will the freezing point of the solution be ... 

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