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26 October, 23:39

How do the viscosities of liquids and low-density gases depend on the temperature and pres - sure?

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  1. 26 October, 23:48
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    Effect of Temperature and Pressure on Viscosity

    Case I Liquids

    Viscosity of liquids decreases with the increase in temperature.

    This is due to decrease in cohesive forces in case of liquids with the increase in temperature.

    Viscosity of liquids increases with the increase in pressure.

    This is due to the increase in compression due to rise in pressure.

    Case II Gases

    Viscosity of gases increases with the increase in temperature.

    This is due to the increase in the number of collisions with the increase in temperature.

    There is no considerable change in the viscosity of gases with the increase in pressure.
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