Melting Points and Solid Types

The video tutorial discusses how to rank materials by melting point based on their chemical formulas. It explains the identification of network covalent, ionic, and molecular solids, and how to use intermolecular forces to determine melting points. Examples are provided to illustrate the ranking process, including the use of Coulomb's law for ionic solids.

What is the key factor in determining the melting point of a material?

• The age of the material

• The size of the material

• The type of solid it is

• The color of the material

Which of the following is NOT a network covalent solid?

• Silicon

• Potassium bromide

• Silicon dioxide

• Carbon

How can ionic materials be identified?

• As combinations of metals and nonmetals

• By their color

• By their smell

• By their taste

What type of solid is likely to have a low melting point?

• Network covalent solid

• Metallic solid

• Ionic solid

• Molecular solid

Which intermolecular force is NOT present in HBr?

• Ionic bonding

• Dispersion

• Hydrogen bonding

• Dipolar

What is the tiebreaker for two similar materials that only have dispersion forces?

• Volume

• Molar mass

• Color

• Density

Which of the following materials is a molecular solid?

• Calcium sulfide

• Ammonia

• Potassium bromide

• Silicon

What is the main factor in determining the melting point of ionic solids?

• Color

• Coulomb's law

• Electronegativity

• Molar mass

Which material would have the highest melting point based on Coulomb's law?

• Ammonia

• Dioxygen

• Calcium sulfide

• Neon

Which of the following is a factor that does NOT affect the melting point of metallic solids?

• Type of metal

• Color of the metal

• Variable nature of metallic bonds

• Location on the periodic table