How coefficient of liquid and gas depend on temperature ?
How coefficient of liquid and gas depend on temperature ?
Coefficient of viscosity of a liquid decreases while that of a gas increase, with increasing temperature. This is because the viscosity in gases depend upon the molecular momentum exchange while in liquid it depends upon the cohesive force.
$\Rightarrow$ In gas molecular momentum increases due to increase of temperature, hence viscosity increases.
$\Rightarrow$ In the liquid cohesive force decreases with temperature increase, hence viscosity decreases.
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