Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

Mercury melts at -39°C and boils at 357°C. Draw a diagram of the heating curve of mercury. Label all lines and axes, and clearly indicate the melting and boiling points on your diagram.

The vapor pressure of 1-butene is 1.268 atm at 273.15 K and its heat of vaporization is 22.9 kJ/mol. What is the normal boiling point of 1-butene?

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45°C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure?

In hydrogen iodide __________________ are the most important intermolecular forces.

Examine the following phase diagram and identify the feature represented by point A.

The strongest intermolecular interactions between hydrogen fluoride (HF) molecules arise from

When the electron cloud of a molecule is easily distorted, the molecule has a high _____________.

Which of the following atoms should have the smallest polarizability?

Which of the following pairs is arranged with the particle of higher polarizability listed first?

Use molecular orbital band diagrams to explain why metals are good conductors but semiconductors are not.

Neon atoms are attracted to each other by

When silicon is doped with an element from group 3A(13), the device/material produced is a/an

A liquid may be made to boil at room temperature, simply by lowering the pressure.

Of the five major types of crystalline solid, which would you expect each of the following to form? (e.g., H₂O: molecular) a. Sn b. Si c. KCl d. Xe e. F₂

Which of the following statements concerning a face-centered cubic unit cell and the corresponding lattice, made up of identical atoms, is incorrect?

Which one of the following substances does not exist in the indicated solid type?

A metal with a body-centered cubic lattice will have ______ atom(s) per unit cell.

Which of the following is true about kinetic energy, E_k, and potential energy, E_p, when ethyl alcohol at 40°C is compared with ethyl alcohol at 20°C?

The energy of a hydrogen bond is greater than that of a typical covalent bond.

a. State the essential requirements for hydrogen bonding to be important in a compound. b. List four properties of water which are significantly influenced by the presence of hydrogen bonding.