Quote:
Originally Posted by Jetée
Question about condensation: if a can or a glass or a bottle, whatever it may be, is "sweating" the contents of whatever very cold liquid is inside on a warm day, (or even at room temperature) are the beads always pure H2O? basically, what I'm asking is if I'm enjoying a cool glass of milk, is the condensation of what forms on the outside of the glass water, or is it actualy diluted milk?
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When the milk in your glass evaporates, it is essentially being distilled. Heat breaks the hydrogen bonds, converting water from a liquid to a gaseous state. This separates the water from everything else and sends it in to the atmosphere.
Long story, short; The condensation is always water. When a glass is filled with a liquid that is cooler than the surrounding air temperature, the gaseous moisture (water) in the atmosphere condenses in to a liquid form and accumulates on the outside of the glass via an exothermic reaction.