Search results
Results from the WOW.Com Content Network
Differences in volatility can be observed by comparing how fast substances within a group evaporate (or sublimate in the case of solids) when exposed to the atmosphere. A highly volatile substance such as rubbing alcohol (isopropyl alcohol) will quickly evaporate, while a substance with low volatility such as vegetable oil will remain condensed ...
The Mpemba effect is the name given to the observation that a liquid (typically water) that is initially hot can freeze faster than the same liquid which begins cold, under otherwise similar conditions. There is disagreement about its theoretical basis and the parameters required to produce the effect.
This is why evaporating sweat cools the human body. Evaporation also tends to proceed more quickly with higher flow rates between the gaseous and liquid phase and in liquids with higher vapor pressure. For example, laundry on a clothes line will dry (by evaporation) more rapidly on a windy day than on a still day.
I'll admit, I've thrown a can of beer in the freezer to chill it fast. But if you leave a can of beer or carbonated water in the freezer for too long and it won't just freeze; it will explode.
An instant cold pack is a single-use device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic process. This process absorbs heat from the surroundings, quickly ...
$53 at Amazon.com . $105 $45 at Target.com . What we like: Using one container for a microwave, freezer, dishwasher and oven can be a time-saver in the kitchen. What to know: Only the glass ...
Particularly large cold traps are necessary when removing large amounts of liquid as in freeze drying. Cold traps also refer to the application of cooled surfaces or baffles to prevent oil vapours from flowing from a pump and into a chamber. In such a case, a baffle or a section of pipe containing a number of cooled vanes, will be attached to ...
Myth #5: Having a drink will warm you up on a cold day. As summer ends and the temperatures begin to dip, fall and holiday-themed cocktails designed to warm you up from the inside out become all ...