Glass Flask
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Glass Flask
Vacuum Flasks - An Essential Temperature Perseverance For Beverages
Vacuum flasks are more commonly known as thermos flasks by most individuals. Instead of stainless steel, flasks are usually made of metal, plastic, glass, or foam, with hollow walls within. The flask works effectively by blocking the heat transfer from the outside surrounding and thus, thermos flasks function well in preserving the cold temperature of the beverages especially during traveling or special occasions.
The thermos flasks are convenient for people of all ages. They are also extremely useful during hot weather when individuals constantly seek cold beverages to refresh themselves. Students can use the flasks when they attend school in replacement of their water tumblers. The flasks are light and easy to handle without any complicated functions. Thus, students can easily bring the vacuum flasks to school without the need to worry on the ways to function the vacuum flasks.
The thermos flasks are also important and useful for individuals especially when their work involves a lot of outdoor running and exploring. Individuals that have to work under constant hot temperature, no matter indoor or outdoor, will find the vacuum flasks useful in ensuring the constant supply of cold beverages when they are tired or when they need something cold to refresh themselves. This will thus eliminate the need for these individuals to constantly look for a local store to purchase more cold beverages, which will eventually cost a lot. All they need to do is to fully refill their vacuum flasks and they will have constant supply of cold beverages throughout the hours of working.
Beside cold beverages, thermos flasks are also able to preserve the temperature of hot beverages. During cold weather, individuals can refill their flasks with hot beverages to keep them warm throughout the hours. Compare to the use of normal glasses or cups containing their hot beverages such as coffee and tea; individuals do not need to worry about re-heating their beverages when they use a thermos because unlike the normal cups and glasses, the temperature of the beverage in the flask will not decrease even after the beverage is contained for a long time.
Furthermore, the thermos flasks are also useful for travelers, no matter what weather condition they are traveling in. During hot weather, cold beverages are important in refreshing an individual's mind and body, especially when they had been traveling non-stop or for hours. For this, vacuum flasks can help in preserving the temperature of the cold beverages during their trip. During cold weather, hot beverages are essential in keeping individuals warm and in the same time, keeping their minds and bodies alert. For this, vacuum flasks can carry out the job in preserving the warm temperature of a hot beverage. All these factors and functions of the thermos flasks can really help individuals in maintaining their ability to enable them in carrying out their tasks. In the same time, the functions of the vacuum flasks can also decrease the frustration of individuals and also, provide convenience to them.
About the Author
A must-have for any traveling or everyday routine, Vacuum Flasks are a great way to keep your beverages fresh for hours. DiscountMugs offers a wide variety of Personalized Vacuum Flasks to choose from in all different styles, colors, and sizes.
1)glass laboratory flask is filled with gas at 31°C and 0.95 atm pressure,?
sealed, and then heated to 111°C. What is the pressure inside the flask?
2) A typical room is 4.0 m long, 5.2 m wide, and 2.3 m high. What is the total mass of nitrogen in the room assuming that the gas in the room is at STP and that air contains 21% oxygen and 79% nitrogen?
0.95 / 304 K = p2 / 384 K
p2 = 1.2 atm
V = 4.0 x 5.2 x 2.3 =47.84 m^3 => 47840 dm^3
volume N2 = 47840 x 79/100=37793.6 L
moles N2 = 37793.6/ 22.4 =1687
mass N2 = 1687 mol x 28.02 g/mol=4.73 x 10^4 g
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