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As the temperature increases, the thermal conductivity of a gas
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- increases
- decreases
- remains constant
- increases up to a certain temperature and then decreases
- increases
Correct Option: A
| K = | ||
| 3NA |
Where K is thermal conductivity
V is mean particle speed
λ is mean free path
Cv is molar head capacity
NA is Avogadro’s number
n is particles per unit volume
Gases transfer heat by direct collisions between molecules. As the temperature increases, the thermal conductivity increases due to increase in speed, movement and collisions in the molecules. From the above expression, by increasing mean particle speed, the thermal conductivity increases.
