GATE ME 2014 Set 4 — Question 22
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Heat Transfer → Conduction → Thermal Conductivity & Resistance
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Question
As the temperature increases, the thermal conductivity of a gas
Correct answer
(A) increases
Solution
According to the kinetic theory of gases, the thermal conductivity () of a gas is directly proportional to the square root of its absolute temperature ():As the temperature increases, the mean molecular velocity increases, leading to more frequent collisions and higher energy transfer rates. Therefore, the thermal conductivity of a gas increases with an increase in temperature.
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