The outer body of the inner bottle of a thermos flask is made silver in colour . Why?
Answers
Answered by
25
The thermos flask is made in a way that it uses very efficient methods to prevent the gain or loss of heat by the thermos flask. The following are ways in which thermos flask employs such methods:
1) Prevention of heat loss by radiation
The thermos flask has the inside bottle(or flask) painted o coated silver. The silver forms a shinny covering on the inside of the flask that reflects heat, thus preventing the gain or loss of heat by radiation.
--------------------------------------------------------------------------------------------------
2) Prevention of heat loss by convection.
The thermos flask has a plastic top and a vacuum in between the double layer of the flask. These two structures help prevent heat to be lost or gained by the thermos flask through the process of convection.
-------------------------------------------------------------------------------------------------
3) Prevention of heat loss by conduction
To ensure this happens, the thermos flask is made of materials that are poor conductors of heat. The materials used, in most cases, are plastics that are used to make the outer casing and the cap. The plastic minimizes heat loss by heat conduction or its gain.
-------------------------------------------------------------------------------------------------
The silver coating is very important in the thermos flask as it helps minimize heat loss by radiation.
1) Prevention of heat loss by radiation
The thermos flask has the inside bottle(or flask) painted o coated silver. The silver forms a shinny covering on the inside of the flask that reflects heat, thus preventing the gain or loss of heat by radiation.
--------------------------------------------------------------------------------------------------
2) Prevention of heat loss by convection.
The thermos flask has a plastic top and a vacuum in between the double layer of the flask. These two structures help prevent heat to be lost or gained by the thermos flask through the process of convection.
-------------------------------------------------------------------------------------------------
3) Prevention of heat loss by conduction
To ensure this happens, the thermos flask is made of materials that are poor conductors of heat. The materials used, in most cases, are plastics that are used to make the outer casing and the cap. The plastic minimizes heat loss by heat conduction or its gain.
-------------------------------------------------------------------------------------------------
The silver coating is very important in the thermos flask as it helps minimize heat loss by radiation.
Answered by
23
The thermos flask has one main purpose, that is to maintain the temperature on the liquid put in it, whether cold or hot. The thermos flask has been designed to use efficient methods to prevent heat loss or gain. These are some of the way this is made possible:
1. Prevention of heat transfer by RADIATION:
This is made possible by the silver coating on the inner bottle which reflects heat thus preventing heat transfer.
2. A vacuum between its two walls:
This vacuum prevents heat loss or gain through convention
3. Thin glass walls:
The glass walls have been designed to be extremely thin to prevent heat loss by conduction.
Therefore,
The silver coating is meant to ensure that heat transfer through the process of radiation is prevented.
1. Prevention of heat transfer by RADIATION:
This is made possible by the silver coating on the inner bottle which reflects heat thus preventing heat transfer.
2. A vacuum between its two walls:
This vacuum prevents heat loss or gain through convention
3. Thin glass walls:
The glass walls have been designed to be extremely thin to prevent heat loss by conduction.
Therefore,
The silver coating is meant to ensure that heat transfer through the process of radiation is prevented.
Similar questions