When temperature of a liquid increases, its surface tension

Assessment: JAMB UTME - Physics - 1999 Subject: Physics

Question 1 Report

When temperature of a liquid increases, its surface tension
Answer Details
When the temperature of a liquid increases, the average kinetic energy of the molecules in the liquid also increases. This causes the molecules to move more rapidly and break the intermolecular forces holding them together. This leads to a reduction in the attractive forces at the surface of the liquid and a decrease in the cohesive forces within the liquid, causing a decrease in surface tension. Therefore, the answer is: Decreases.
Read lesson note on Temperature And Its Measurement (JAMB)
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