How does surface tension change with an increase in temperature?

As temperature increases, surface tension generally decreases. This is because higher temperatures provide additional energy to the molecules of a liquid, causing them to move more rapidly. As a result, the cohesive forces between the molecules at the surface become weaker, leading to a lower surface tension.

In the context of aerial application of pesticides, understanding how surface tension affects the behavior of liquid droplets is crucial. Lower surface tension can result in smaller droplet sizes and improved coverage on treated surfaces, which can enhance the effectiveness of the pesticide. This knowledge helps applicators choose appropriate formulations and settings to optimize their application techniques for better pest control outcomes.