Reviewer in Gen. Chem. 2 - Midterms

Which of the following statement is incorrect about Kinetic Molecular Theory?

• Matter is made up of particles.

• Energy exist in all particles of matter.

• All particles of matter are constantly moving.

• The temperature of the particles doesn't influence the state of matter.

Which of the following intermolecular forces is the weakest?

• Dipole-dipole interaction

• London dispersion forces

• Hydrogen bonding

• Ion-dipole interaction

Which of the following intermolecular forces can only be found on polar molecules?

• Dipole-dipole interaction

• London dispersion forces

• Hydrogen bonding

• Ion-dipole interaction

Which of the following statements concerning surface tension is correct?

• Surface tension will be higher for molecules with stronger intermolecular forces of attraction.

• Surface tension will be lower for liquids with stronger intermolecular forces of attraction.

• Surface tension will be higher for compounds with weaker intermolecular forces of attraction.

• Surface tension will be lower for elements with weaker intermolecular forces of attraction.

Which of the following statements concerning vapor pressure is correct?

• Vapor pressure will be higher for molecules with stronger intermolecular forces of attraction.

• Vapor pressure will be lower for molecules with stronger intermolecular forces of attraction.

• Vapor pressure will be higher for molecules with weaker intermolecular forces of attraction.

• Vapor pressure will be higher lower ments with weaker intermolecular forces of attraction.

Which of the following best describes the difference between amorphous and crystalline solids?

• Amorphous solids have randomly distributed molecules whereas crystalline solids have regular arranged molecules.

• Amorphous solids have indefinite melting points, whereas crystalline solids have definite melting points.

• Amorphous solids have isotropic physical properties, whereas crystalline solids have anisotropic physical properties.

• All of the above

Which of the following best describes the difference between amorphous and crystalline solids?

• At 1 atm and temperature less than 0°C, water is in solid form.

• At 1 atm and temperature greater than 100°C, water is in liquid form.

• At 1 atm and temperature between 0°C and 100°C, water is in gas form.

• All of the above

It is a graph in which a substance is subjected to decreasing temperature against time to measure the amount of energy it absorbs and the change of its state.

• Heating curve

• Melting curve

• Cooling curve

• Deposition curve

A vessel contains 0.7 moles H2, 3.0 moles N2, and 2.4 moles F2. What is the mole fraction of F2?

• 0.40

• 0.41

• 0.39

• 0.38

If 8.22 moles of KBr are dissolved in 3.52 kg of water, what is the molality of the KBr solution?

• 2.66 mol/kg

• 2.33 mol/kg

• 2.44 mol/kg

• 2.34 mol/kg