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Increase in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?

Option: 1

No effect

Option: 2


Option: 3


Option: 4

Nothing can be predicted

Answers (1)


Effect of Temperature on Viscosity

On the increasing temperature, viscosity decreases as the average thermal energy of molecules increase hence the effect of intermolecular attraction forces decreases.
It can be shown by the Arrhenius equation as follows:
\mathrm{\eta=A e^{E_{a}/R T}}
Here T = Temperature, R = Universal gas constant,  Ea = Activation energy.


With the increase in kinetic energy, intermolecular forces of attraction decrease. Thus, due to this decrease, the viscosity also decreases.
Therefore, Option(2) is correct

Posted by

Divya Prakash Singh

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