
Почему лед обладает большей теплопроводностью, чем свежевыпавший снег?


Ответы на вопрос







Why does ice have higher thermal conductivity than freshly fallen snow?
Ice has higher thermal conductivity than freshly fallen snow due to its physical properties and structure. When snow falls, it consists of individual ice crystals that are loosely packed together with air pockets in between. This loose structure of snow traps air, which acts as an insulator and reduces the transfer of heat. As a result, freshly fallen snow has lower thermal conductivity.
On the other hand, ice is formed when snow undergoes a process called compaction and melting. During compaction, the individual snowflakes are compressed, causing the air pockets to be squeezed out. This leads to a denser structure with fewer air pockets. The absence of air pockets in ice allows heat to transfer more easily through the material, resulting in higher thermal conductivity compared to freshly fallen snow.
In addition to the difference in structure, the presence of impurities in ice can also affect its thermal conductivity. Impurities such as dirt or minerals can alter the thermal properties of ice, making it more conductive or less conductive depending on the specific impurities present.
To summarize, the higher thermal conductivity of ice compared to freshly fallen snow can be attributed to its denser structure with fewer air pockets and the absence of impurities that may affect its thermal properties.


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