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How does a thermos flask keeps a hot liquid hot and a cold liquid cold?
A thermos is able to do what it does by using a several of physical and material properties to keep our hot chocolate hot and our ice tea icy. A thermos has an inner container made of glass. This container is really like one bottle inside of another bottle and sealed at the ends by melting the edges together. The air is removed out from the space between the two bottles to produce a vacuum, which is not a good conductor of heat and does a good job at slowing down the movement of heat. To slow down the other heat they coat the facing surfaces of the glass bottles with a silvery coating (like a mirror). This reflects the heat and helps slow down any losses that might get that way. They use a material like cork or rubber to make the bottle stopper and anything else that might touch the outside surface of the glass container. These materials are bad conductors of heat and slow down the heat loss. What's left is what we can see on the outside which can be metal or plastic and is the covering for the glass bottles. The idea here (with the thermos) is to slow down the movement of heat from one place to the other. So if you have hot stuff in the thermos or cold stuff in the thermos, the end result is the same. Keep heat from moving to where you don't want it to go for as long as possible. NB It's worth mentioning that modern vacuum flasks (Thermos being a trade name) are made almost entirely of stainless steel, inside and out - it doesn't shatter and is naturally reflective, although not polished to a mirror shine when used as a flask inner. Modern stoppers are also made of plastic.
When can an Erlenmeyer flask be used instead of a beaker?
I my experience the Erlenmeyer flask is better for certain things than others.... what I mean is that is has labeled measurements on the side and the increments are based on the size of the flask but the volumetric flask is better is you want to dilute a solution at a certain volume to find....molarity they both have good qualities it just depends on what you want to use it for.
Use of flask?
A flask is a container for liquids. It is similar to a bottle.
What use of erlen meyer flask?
an erlenmayer or what we called erlen in French is a material useful in chemistry .commonly known in English as a conical flask or E-flask, is a widely used type of laboratory flask which features a conical base and a cylindrical neck. They are usually marked on the side to indicate the approximate volume of their contents. It is named after the German chemist Emil Erlenmeyer, who created it in 1861.Erlenmeyer flasks are used for pH titrations and in microbiology for the preparation of microbial cultures.
What is the use of the flask in the laboratory?
Laboratory flask of different types are designed to contain liquids in larger volumes.
What is the use of double layered glass in a thermos flask?
To see through :0
Use a sentence with the word flask?
We all went on a picnic , and ate some food and had a hot drink from a thermos flask .
What is the use of double glass in thermos flask?
The vacuum space between the two silvered surfaces make efficient heat insulation against heat loss.
Who create a thermos?
This is from wikipedia:The vacuum flask was invented by Scottish physicist and chemist Sir James Dewar in 1892 and is sometimes referred to as a Dewar flask after its inventor. The first vacuum flasks for commercial use were made in 1904 when a German company, Thermos GmbH, was formed. Thermos, their trademark for their flasks, remains a registered trademark in some countries but was declared a genericized trademark in the U.S. in 1963 as it is colloquially synonymous with vacuum flasks in general.
How thermoflask is built?
Hi there the thermos flask use inslators inside its design such as cork and plastics . The inside where youre fluid goes is usually covered in a reflective material to prevent heat absorption.The lid also traps heat escapeing from the top and stops spill and leaks . theres is also a space in the flask wall which has a vacuum in it to prevent further heat loss.
How does thermos flask maintain the temperature of the object inside it?
The flask makes use of heavy insulation, either by vaccum, air cushion or just filled with very poor heat conductors to slow the heat loss from a hot drink or warming from the enviroment.
What did Sir James Dewar use the thermos for?
He didn't. He used a Dewar or vacuum flask. It is used to keep things hotter or colder than the surrounding ambient temperature. He failed to patent the idea and it was subsequently patented by Thermos. Thermos is still a registered trade mark in many countries, though it has been declared generic in the US.
What is the best way to keep water warm without using a heating object?
The best way to do so be be to use a good thermal insulator. A thermos flask would suit this purpose.
How do you use the word thermos in a sentence?
my thermos was full with ice cold water.
How do you use thermos bottle in a sentence?
you fill the thermos bottle with liquid in gas occlusion's
How does a thermos flask keeps a hot liquid hot and a cold liquid cold?
A thermos is able to do what it does by using a several of physical and material properties to keep our hot chocolate hot and our ice tea icy. A thermos has an inner container made of glass. This container is really like one bottle inside of another bottle and sealed at the ends by melting the edges together. The air is removed out from the space between the two bottles to produce a vacuum, which is not a good conductor of heat and does a good job at slowing down the movement of heat. To slow down the other heat they coat the facing surfaces of the glass bottles with a silvery coating (like a mirror). This reflects the heat and helps slow down any losses that might get that way. They use a material like cork or rubber to make the bottle stopper and anything else that might touch the outside surface of the glass container. These materials are bad conductors of heat and slow down the heat loss. What's left is what we can see on the outside which can be metal or plastic and is the covering for the glass bottles. The idea here (with the thermos) is to slow down the movement of heat from one place to the other. So if you have hot stuff in the thermos or cold stuff in the thermos, the end result is the same. Keep heat from moving to where you don't want it to go for as long as possible. NB It's worth mentioning that modern vacuum flasks (Thermos being a trade name) are made almost entirely of stainless steel, inside and out - it doesn't shatter and is naturally reflective, although not polished to a mirror shine when used as a flask inner. Modern stoppers are also made of plastic.
How do you eat a thermos flask?
A thermos flask is not meant to be eaten. It is designed to keep food and drinks hot or cold for an extended period of time. To use a thermos flask, simply open the lid, pour in your desired food or drink, seal the lid tightly, and enjoy your hot or cold item when desired.
