The relationship between surface tension and temperature as measured by the pendant drop method can be described by the following equation: T = T * 1 - k * T - T where:- T is the surface tension at temperature T,- T is the surface tension at a reference temperature T,- k is the temperature coefficient of surface tension, and- T and T are the temperatures in Kelvin or Celsius.This equation shows that surface tension generally decreases with increasing temperature. The pendant drop method is a technique used to measure surface tension by analyzing the shape of a droplet of liquid suspended from a thin tube. The surface tension is determined by balancing the forces acting on the droplet, including gravitational force and the force due to surface tension.As temperature increases, the kinetic energy of the molecules in the liquid increases, leading to a decrease in the attractive forces between the molecules. This results in a decrease in surface tension. The temperature coefficient k is a constant that depends on the specific liquid being studied and can be determined experimentally.