Why Does Surface Tension Decrease With Increasing Temperature

Why Does Surface Tension Decrease With Increasing Temperature. An ideal gas has van der waal's constant a and b equal to zero. Surface tension tries to decrease the surface area of the liquid to the minimum.

PPT Chapter 12 Intermolecular Attractions and the Properties of
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This increases with cooling and decreases with heating. Surface tension does not depend on gravity. How does temperature influence surface tension?

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