In certain regions, the natural log of the actual vapor pressure divided by saturation vapor pressure is directly proportional to "two times the molar volume times this quantity" in the Kelvin equation.
In certain regions, the natural log of the actual vapor pressure divided by saturation vapor pressure is directly proportional to "two times the molar volume times this quantity" in the Kelvin equation. Young's equation can be used to calculate this quantity  by measuring the contact angle. The value of this quantity is equal to the derivative of Gibbs free energy with respect to area. Sodium dodecyl sulfate belongs to a class of substances that lowers this quantity, known as detergents. For 10 points, name this cohesive quantity describes how liquid droplets hold together at an air interface.
In certain regions, the natural log of the actual vapor pressure divided by saturation vapor pressure is directly proportional to "two times the molar volume times this quantity" in the Kelvin equation.
surface tension [accept surface energy or interfacial tension]