Review Quiz

• Kinetic Molecular Theory explains the properties of solids and liquids based on observations in the sample’s intermolecular forces of attraction and the kinetic energy between the individual particles
• The dispersion force is the strongest type of intermolecular force (T/F)

  False
• Intermolecular force is the attraction between/among molecules
• Hydrogen bonding is a type of dipole-dipole interaction that occurs between hydrogen and highly electronegative elements like fluorine, oxygen, and nitrogen
• Hydrogen fluoride exhibits a london dispersion force (T/F)

  False
• Dipole-dipole forces exist between nonpolar molecules (T/F)

  False
• The solubility of table salt in water is due to the ion-dipole force
• Two samples in the test tube are either water/mercury. Using the convex-shaped meniscus, you were able to identify that the first sample was mercury because the cohesion of the molecules is greater than the adhesion between the sample and the walls of the test tube
• Adhesion - attraction between different molecules
• Cohesion - attraction between same molecules
• Water droplets that fall on the surface tends to form rounded drops, meaning the water molecules are cohesive
• Placing a paper towel in water, and the water moves up the towel. This phenomenon proves that water molecules are adhesive
• Capillary action causes a liquid to rise in narrow tubes and drawn into small openings
• Liquids that have weak intermolecular forces has weak surface tension
• Surface tension explains why spiders float on water
• Viscosity causes honey to have a great resistance to flow
• The stronger the intermolecular force, the lower the liquid’s viscosity (T/F)

  False
• Boiling point - temperature
• Vapor pressure is the pressure exerted by a liquid’s vapor when in equilibrium with a liquid/solid
• Substances with strong intermolecular forces have a low vapor pressure
• The water at the bottom of a lake/ocean usually has a temperature of about 4*C, at this temp the water’s density is at its maximum. This proves that water is a liquid at normal physiological temperature
• The reason why table salt and table sugar dissolves quickly in water is because water molecules are adhesive
• Specific heat refers to the amount of heat needed to change the temperature 1 gram of substance by 1 degree celsius
• Al2O3 forms an ionic bond