1. Categorize the molecules and statements based on whether they are an example or property of an ionic solid, molecular solid, network (atomic) solid, or all three.
IonicMolecularNetwork (atomic)Describes all three
Answer Bank : Diamond, poor conductor in solid form, typically low melting points, composed of molecules,compound of ions, P4, Crystalline solid, graphite, good conductor of electricity when dissolved in solution, NaCl, composed of atoms connected by covalent bonds, nonconductor of electricity when dissolved in solution
Strong intermolecular forcesWeak intermolecular forces
Answer Bank: high vapor pressure, high viscosity, high boiling point, high surface tension
3. If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond?
Which of the substances have polar interactions (dipole–dipole forces) between molecules?
Which substances exhibit only London (dispersion) forces?
Classify each substance based on the intermolecular forces present in that substance.
Hydrogen bonding, dipole–dipole, and dispersionDipole–dipole and dispersion onlyDispersion only
Answer Bank : H2, HCl, HF, CO
7. How much heat energy is required to convert
of liquid sulfur dioxide,
at 263.1 K if the molar heat of vaporization of
is 24.9 kJ/mol, and the specific heat capacity (
) of liquid
of solid iron at
to liquid iron at
The molar heat of fusion of iron is 13.8 kJ/mol. Iron has a normal melting point of
The specific heat capacity of solid iron is
? The molar heat of fusion of
, can be melted with
kJ of heat energy? The molar heat of fusion of benzene is 9.95 kJ/mol.
The molar heat of vaporization of ammonia is 23.4 kJ/mol.
can be boiled with
of heat energy? The molar heat of vaporization of ethanol is 38.6 kJ/mol.
Find the melting point and boiling point of each substance.
Identify the states of matter present at various points along the phase change diagram for water. The
‑axis shows the energy added. The
‑axis measures temperature in degrees Celcius.