Which of the following properties gets smaller as the strength of intermolecular forces increases?
As the strengths of intermolecular forces increase, surface tension, viscosity, melting point and boiling point increase, while vapor pressure decreases. Molecular solid: Made up of discrete covalently bonded molecules held together in the solid phase by weaker forces (LD, dipole, or hydrogen bonds).
Which of the following physical properties would be expected to decrease as intermolecular forces increase?
Intermolecular forces are the forces that bind two molecules together. Physical properties are affected by the strength of intermolecular forces. Melting, boiling, and freezing points increase as intermolecular forces increase. Vapor pressure decreases as intermolecular forces increase.
What is surface tension How does it depend on intermolecular forces?
Surface tension is the energy required to increase the surface area of a liquid by a given amount. The stronger the intermolecular interactions, the greater the surface tension. The viscosity of a liquid is its resistance to flow. Liquids that have strong intermolecular forces tend to have high viscosities.
What intermolecular force is responsible for surface tension?
Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.” The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
What is relation between surface tension and surface area?
AW=2ldx2Tldx=T. This work is stored in the unit surface area in the form of potential energy. This potential energy is called the surface energy. The above relation shows that the surface energy per unit area of a liquid is equal to its surface tension.
Do surface tension depends on area?
(57) Depending on the value of the surface area, the surface tension can vary by ±20% compared to the value of surface tension (γ∞) which is defined as the surface tension calculated with the largest surface area (see Figure 1).
What is Alpha in surface tension?
The surface tension of water at 0^0C is 75.5dyne/cm . Find surface tension of water at 25^0C ( alpha for water = 0.0021/K )