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Antifreeze changes the freezing point and boiling point of the liquid it is mixed with. This helps to prevent the liquid from freezing in cold temperatures and from boiling over in hot temperatures.
Adding antifreeze to your radiator is a physical change because the antifreeze retains its chemical composition and properties when mixed with the water in the radiator. It does not undergo a chemical reaction to form a new substance.
One molecule of antifreeze typically contains multiple atoms. The chemical formula for ethylene glycol, a common compound in antifreeze, is C2H6O2, which consists of two carbon atoms, six hydrogen atoms, and two oxygen atoms.
Be sure to add antifreeze to your car's radiator before winter to prevent the coolant from freezing in cold temperatures.
Heating can change matter from a solid to a liquid or from a liquid to a gas. Cooling can change matter from a gas to a liquid or from a liquid to a solid.
When antifreeze is heated, it changes from a liquid to a gas. This process is known as vaporization. If antifreeze is heated beyond its boiling point, it can produce harmful vapors and potentially lead to a dangerous situation due to the toxicity of the chemicals in antifreeze.