ubernerdsteve

OK i made a name on this forum just because I saw this rediculous post. Antifreeze DOES prevent boiling and it DOES prevent freezing as the previous person stated. Glycol-based solutions are commonly used by a number of industries. Glycol-based solutions are inexpensive, relatively easy to manufacture and modify, and have a number of uses. Glycerine (glycerol) has the chemical formula C3H5 (OH)3 (MW = 92) and ethylene glycol (EG) has the chemical formula CH2(OH)CH2(OH) (MW = 62). A number of glycol-based chemicals are used that have the same root chemical formula with one or more different functional groups to create products with alternate properties and uses. EG polymers have a wide range in their degree of polymerization (DP) and typically maintain their DP well during use (i.e., they do not readily break down to monomer-EG, even at elevated temperatures).The most common use for EG is as a heat exchange fluid, because it has excellent thermal conductivity properties and EG/water solutions have high boiling points and low freezing points. EG and EG derivatives are also used during manufacture of resins, pharmaceuticals, foods, surfactants, lubricants(you got ONE thing right!), inks, solvents, polymers (plasticizers), and other products. By the way, Im sure you guys already know this, but EG is poisonous if ingested in sufficient quantity. The other thing is your point about the water not boiling because the system is sealed is flawed, it is right but you dont know why. The cooling system in a car WILL boil if you get it hot enough. If you take a look at the cap, it is rated for a certain pressure, 5lbs, 10lbs, ect., and this is to increase the pressure of the cooling system by that amount. If you know much chemistry you know that the boiling of water can be expressed as a function of pressure. This is a well known fact and that is why there is separate cooking directions for those who live in higher altitudes (as their water boils at a cooler temperature, therefore increasing cook time, in fact you can make water boil at room temperature with a bell vaccum). The general rule that the probability of a molecule being in a state of energy E is exp(-E/kT) times a "phase space factor". If you think quantum mechanically, then the space factor tells how many different ways there are for the molecule to be in that state. If you think classically, the phase space factor can be thought of as how much room you have in physical space (x,y,z) times how much room in velocity space (vx,vy,vz). If the molecules require some energy E to be torn from their cozy home in the liquid and set on their own in the air, then the probability of them being out in the air will be proportional to exp(-E/kT). To the extent that the water vapor behaves like an ideal gas, the pressure is proportional to T times this probability. So: p ~ T exp(-E/kT) People who are looking for information are not looking for people to make up garbarge and post it, if you dont know what you are talking about, dont act like you do, just let the other people post. Sorry to wake up the dead, I know its an old post but this REALLY bothered me as Im an engineer with a lot of thermodynamics experience and this post was just utter stupidity. Sorry, things like this bother people like me thanks for reading now that we have the record straight Steve O