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- Arrange these compounds in order of increasing boiling point and explain your reasoning: a. H2S b. H2Se c. H2O.
Problem 4
Problem 35
Determine the kinds of intermolecular forces that are present in each element or compound. a. N2 b. NH3 c. CO d. CCl4
Problem 36a
Determine the kinds of intermolecular forces that are present in each element or compound. a. Kr
Problem 36b
Determine the kinds of intermolecular forces that are present in each element or compound. b. NCl3
Problem 36c
Determine the kinds of intermolecular forces that are present in each element or compound. c. SiH4
Problem 38a,b
Determine the kinds of intermolecular forces that are present in each element or compound. a. PH3 b. HBr
Problem 38d
Determine the kinds of intermolecular forces that are present in each element or compound. d. I2
- Arrange these compounds in order of increasing boiling point: a. CH4, b. CH3CH3, c. CH3CH2Cl, d. CH3CH2OH. Explain your reasoning.
Problem 39
Problem 41a,b
In each pair of compounds, pick the one with the higher boiling point. Explain your reasoning. a. CH3OH or CH3SH b. CH3OCH3 or CH3CH2OH
Problem 41c
In each pair of compounds, pick the one with the higher boiling point. Explain your reasoning. c. CH4 or CH3CH3
Problem 42a,c
In each pair of compounds, pick the one with the higher boiling point. Explain your reasoning. a. NH3 or CH4 c. CO2 or NO2
Problem 42b
In each pair of compounds, pick the one with the higher boiling point. Explain your reasoning. b. CS2 or CO2
Problem 43
In each pair of compounds, pick the one with the higher vapor pressure at a given temperature. Explain your reasoning. a. Br2 or I2 b. H2S or H2O c. NH3 or PH3
Problem 44a,c
In each pair of compounds, pick the one with the higher vapor pressure at a given temperature. Explain your reasoning. a. CH4 or CH3Cl c. CH3OH or H2CO
Problem 44b
In each pair of compounds, pick the one with the higher vapor pressure at a given temperature. Explain your reasoning. b. CH3CH2CH2OH or CH3OH
Problem 45a,b,c
Determine whether each pair of compounds forms a homogeneous solution when combined. For those that form homogeneous solutions, indicate the type of forces that are involved. a. CCl4 and H2O b. KCl and H2O c. Br2 and CCl4
Problem 45d
Determine whether each pair of compounds forms a homogeneous solution when combined. For those that form homogeneous solutions, indicate the type of forces that are involved. d. CH3CH2OH and H2O
Problem 46
Determine whether each pair of compounds forms a homogeneous solution when combined. For those that form homogeneous solutions, indicate the type of forces that are involved. a. CH3CH2CH2CH2CH3 and CH3CH2CH2CH2CH2CH3 b. CBr4 and H2O c. LiNO3 and H2O d. CH3OH and CH3CH2CH2CH2CH3
- Why does water wet some surfaces and bead up on others, while mercury beads up on almost all surfaces?
Problem 48
Problem 49
The structures of two isomers of heptane are shown. Which of these two compounds would you expect to have the greater viscosity?
Problem 50
Explain why the viscosity of multigrade motor oils is less temperature-dependent than that of single-grade motor oils.
- Why does water in a glass tube with grease or oil residue display a flat meniscus, whereas water in a clean glass tube displays a concave meniscus?
Problem 51
Problem 51c
Determine whether each molecule is polar or nonpolar. c. BrCl5
Problem 52
When a thin glass tube is put into water, the water rises 1.4 cm. When the same tube is put into hexane, the hexane rises only 0.4 cm. Explain.
- Which evaporates more quickly: 55 mL of water in a beaker with a diameter of 4.5 cm or 55 mL of water in a dish with a diameter of 12 cm, and is the vapor pressure of the water different in the two containers? Explain.
Problem 53
Problem 54
Which evaporates more quickly: 55 mL of water (H2O) in a beaker or 100 mL of acetone [(CH3)2CO] in an identical beaker under identical conditions? Is the vapor pressure of the two substances different? Explain.
- Why does spilling room-temperature water over your skin on a hot day cool you down while spilling room-temperature vegetable oil does not?
Problem 55
- Why is the heat of vaporization of water greater at room temperature than at its boiling point?
Problem 56
- The human body obtains 915 kJ of energy from a candy bar. If this energy were used to vaporize water at 100.0 °C, how much water (in liters) could be vaporized? (Assume the density of water is 1.00 g/mL.)
Problem 57
- A 100.0-mL sample of water is heated to its boiling point. How much heat (in kJ) is required to vaporize it? (Assume a density of 1.00 g/mL.)
Problem 58