Intermolecular forces and liquids quiz Flashcards
What are internolecular forces?
The forces holding solids and liquids together
What happen to intermolecular forces when they are melted or boiled?
They are broken or overcome
What are ion-dipole forces?
Intercation between an ion and a dipole, strongest of all intermolecular forces
What are dipole-dipole forces?
exists between neutral and polar molecules, attraction and repulsion keeps ions in motion
What are london dispersion forces?
Two adjacent molecules in a position that indices dipoles
What is hydrogen bonding?
The attraction of a hydrogen atom to another electronegative atom, usually F or O
What is viscosity? How is it involved with intermolecular forces and how can it be changed?
Resistance of a liquid to flow. High intermolcular forces=not flowing alot, can be made less viscious by adding heat
What is surface tension?
Due to molecules in a liquid being attracted to each other and inwards toward the other liquid, its creates a skin like effect on the surface
What are cohesive forces?
Forces in a liquid that bind molecules to each other
What are adhesive forces?
Forces that bind liquid molecules to a surface
How are cohesive and adhesive forces related to meniscus?
Adhesive forces attracted molecules to the side mole a U-Shape and cohesive forces attracted liquids downward creating a curve
What is capillary action?
Water being pulled up a tube
What causes vapor pressure?
Molecules on the surface of a liquid having enough energy to escape the attraction of the liquid an enter a gas phase
What is the relationship between intermolecular forces and vapor pressure?
More intermolecular forces=Less vapor pressure
What is dynamic equilibrium?
The point where the same number of molecules escape and hit the surface of a liquid
