1. Chapter 10 Problem The melting point of potassium is 63.2 o C. Molten potassium has a vapor pressure of 10.0 torr at 443 o C and a vapor pressure of 400.0 torr at 708 o C. A.) Calculate the heat of vaporization of liquid potassium. B.) Calculate the normal boiling point of potassium. C.) Calculate the vapor pressure of liquid potassium at 100 o C.

2. Prentice Hall © 2003Chapter 11 Sample Problem The simple cubic unit cell of a particular crystalline form of barium is 2.8664 o A on each side. Calculate the density of this form of barium in gm/cm 3.

3. Prentice Hall © 2003Chapter 11 Sample Problem The body-centered unit cell of a particular crystalline form of iron is 2.8664 o A on each side. Calculate the density of this form of iron in gm/cm 3. Note: First determine: A. The net number of iron in the unit cell. B. 1 o A = 1 x 10 -8 cm

4. Prentice Hall © 2003Chapter 11 Sample Problem LiF has a face-centered cubic unit cell (same as NaCl). [F- ion is on the face and corners. Li + in between.] Determine: 1. The net number of F - ions in the unit cell. 2. The number of Li + ions in the unit cell. 3. The density of LiF given that the unit cell is 4.02 o A on an edge. ( o A = 1 x 10 -8 cm)