A pot of water starts to boil at 99.0 °C and the atmospheric pressure is 0.989 atm. Boiling happens when the vapor pressure of a liquid is equal to the Thus, the partial pressure of water under these conditions is The content of the bubble is (what's in the bubble?). a. 1.00 atm b. 0.989 atm c. atmospheric pressure d. water vapor e. air

5. Which of the following is not an intermolecular force? a. hydrogen bonds. b. dipole-dipole forces. c. ionic bonds. d. London dispersion forces.

22. According to Boyle's Law, if the pressure of a gas is increased by a factor of 4, the volume 22. will the original value. A. increase to four times B. increase to twice C. decrease to one-half of D. decrease to one-fourth E. stay constant at

Methanol is a highly toxic compound that can cause permanent damage in the optic nerve, leading to blindness. It has an Oxygen atom bonded to a Hydrogen atom, therefore, methanol is capable of exhibiting:   a. hydrogen bonding b. van der Waals forces c. both LDF and hydrogen bonding d. all of the above

18. In terms of attractive forces and kinetic energies of particles, explain what happens during the follow- ing phase changes. Example: In melting, the par- ticles gain enough kinetic energy to overcome the attractive forces that hold them in fixed positions. a. boiling c. freezing b. evaporation d. sublimation

. A chemist collects a sample of oxygen gas in the laboratory by water displacement on a day when the atmospheric pressure in the laboratory is 765 mm Hg. If the equilibrium vapor pressure of the water vapor in the collection vessel is 18 mm Hg, what is the partial pressure of the oxygen in the collection vessel? a. 747 mm Hg b. 765 mm Hg c. 783 mm Hg d. 18 mm Hg

This illustration is the phase diagram of a substance that exists in three phases. Solid Liquid A. Gas Temperature If the pressure of the substance is reduced significantly from the conditions of Point A, while keeping the temperature constant, what change will occur? A. The substance will sublime. B. The substance will boil. O C. The substance will melt. D. The substance will freeze. Pressure

16. What is referred to as the energy (usually in kilojoules) required to vaporize 1 mole of a liquid at a given temperature? molar heat of deposition molar heat of vaporization 17. It is an attraction between unlike molecules. a. molar heat of condensation C. b. d. molar heat of sublimation Adhesion Viscosity a. C. b. Cohesion d. Surface tension 18. This positive hydrogen ends of 1 molecule are attracted to the negative end of the oxygen of another molecule called? Polar molecule Capillary action a. с. b. Non-polar molecule d. Surface tension

A 275 mL sample of CO2 is collected over water at 25 oC when the atmospheric pressure is 0.85 atm. How many moles of CO2 are present? The vapor pressure of water at 25 oC is 24.3 torr.     3.12     0.0372     0.00312     0.0092     0.0322

Which set has processes that are all endothermic? Select one: a.freezing, condensation, and deposition b.melting, evaporation, and sublimation c.melting, condensation, and deposition d.freezing, vaporization, and deposition