When the temperature increases, the surface tension of water

When the temperature increases, the surface tension of water decreases. Here's a step-by-step explanation:

1. Surface tension is the force that makes the surface of liquids behave like a stretched elastic sheet. It's the result of cohesive forces between liquid molecules.

2. In water, these cohesive forces are due to hydrogen bonding between water molecules.

3. As the temperature increases, the kinetic energy of the water molecules also increases. This means the molecules are moving faster.

4. The faster movement disrupts the hydrogen bonds between the water molecules.

5. As more bonds are disrupted, the cohesive forces decrease, which in turn decreases the surface tension.

So, in summary, when the temperature of water increases, its surface tension decreases because the increased molecular movement disrupts the hydrogen bonds that contribute to surface tension.