What happens to the surface tension of water as temperature increases?

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Question: What happens to the surface tension of water as temperature increases?

Options:

Correct Answer: Decreases

Solution:

The surface tension of water decreases as temperature increases.

What happens to the surface tension of water as temperature increases?

What happens to the surface tension of water as temperature increases?

Step 1: Understand what surface tension is. It is the force that makes the surface of water behave like a stretched elastic sheet.
Step 2: Know that temperature is a measure of how hot or cold something is.
Step 3: Realize that when water is heated, the molecules move faster and spread apart.
Step 4: As the molecules spread apart, the attractive forces between them at the surface weaken.
Step 5: Since the attractive forces are weaker, the surface tension decreases.
Step 6: Conclude that as the temperature of water increases, its surface tension decreases.

Surface Tension – Surface tension is the cohesive force at the surface of a liquid that causes it to behave like a stretched elastic membrane.
Temperature Effect – As temperature increases, the kinetic energy of water molecules increases, leading to a decrease in cohesive forces and thus a reduction in surface tension.