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What are two changes of states are involved in freeze-drying?
The two changes of state involved in freeze drying are melting and freezing.
What two changes of state take place during distillation?
The two changes of state involved in freeze drying are melting and freezing.
How does freeze-dried coffee differ from standard instant coffee?
There are two main ways of producing instant coffee - freeze drying and spray drying. In freeze-drying, brewed coffee is frozen into granules, which are then placed in vacuum chamber, where the water sublimates (evaporates w/o liquifaction). In spray-drying, brewed coffee is sprayed in tower and dried by hot air in the matter of seconds. Freeze dried instant coffee advantage: higher quality product, better preserved flavor. Spray dried instant coffee advantages: faster and cheaper.
What is the difference from dried food and freeze-dried food?
Dried food, as its name implies, is food that has been dehydrated, or had most of the moisture content removed through the blowing of warm dry air around the food or by placing the food on screens in the sun on a dry, hot day. Food dehydration can easily be done at home with minimal equipment. Freeze dried food is made through a much more involved factory process that involves pretreatment of the food, a freezing stage that takes the food to very, very low temperatures, and then a two-part drying process that removes virtually all of the water content from the food. Freeze drying is a process that can not be done at home, as it involves sophisticated and expensive equipment. Dried food weighs more than freeze dried food; that is, if two cups of fresh fruit are divided evenly and half is freeze dried and the other simply dried, the freeze dried portion will be much lighter as more water was removed than in the drying process.
Who were the two groups involved in Federalism?
The State Government and the National Government
Is drying three syllable?
No, two.
Lip to lip kisses?
Its called as a smooch where two people involved are in lip-locked state.
What is the Dry suffix?
Drying and dryness are two possibilities.
When did the Incas invent freeze drying their food?
This is often misrepresented online and on children's websites. The Incas did work at high altitudes, with low humidity and lower pressure, but it was not a level that reached sublimation. Think of it as "drying while at freezing temperatures".The Incas would freeze and then dry their food, in two separate steps, as opposed to "freeze-drying" or the modern pharmaceutical and food term lyophilization. The Incas placed their food in cold climates to freeze at night to store as you would a freezer, and then in the day it would evaporate. This process is closer to dehydration and then a freezing step, and wouldn't remove some of the internal water that modern processes would.Freeze-drying requires a vacuum and low temperatures ie. drying while at cold temperatures. In order for this to occur, to have the water inside the food go from liquid to gas (sublimation) , a phase diagram shows that it needs to be less than .006 atm, far far below any environmental conditions the Incas could achieve. This value, .006 atm (4.56 mm Hg) is known as the triple point of water, below this pressure, sublimation can occur.For Instance:Machu Picchu- 7,970 ft above sea level- lets say they wold climb to 10,000 feet at most for this process.At 10,000 feet it would about 60.7 kPa air pressure- (526 mmHg or .69 atm)You can see it is about 100 times too high a pressure to induce sublimation.You wouldn't call homemade beef jerky freeze dried, you'd call it dehydrated.It is a smart process, but it is not reminiscent of the way food and drugs are made nowadays. I have worked in this industry and am just pointing out that the it is semantics. A scientist wouldn't refer to this process as "freeze-drying", maybe a comma in between "freeze , drying" would make it work.
How many syllables are in the word drying?
There's only two
What is the suffix of dry?
Drying and dryness are two possibilities.
What two changes of state does this process involve?
In order to know what two changes of state are involved in a process one needs to know what the process is.
