Chapter 16 Chemistry

TRUE or FALSE: The property of a liquid that measures it's resistance to flow is called resistivity?

• True

• False

TRUE or FALSE: The property of a liquid that measures it's resistance to flow is called viscosity?

• True

• False

Which of these is true about molecules in the liquid state?

• cohesive forces don't matter

• molecules contract to fit their container

• molecules are motionless

• molecules form a pattern arrangement

• molecules are mobile and close together

Which of these correctly describes the difference between "normal boiling point" and "boiling point" of liquids? BP=boiling point

• "Normal BP" is at standard temperature and pressure; "BP" is at other non-standard conditions

• "Normal BP" is 1 mol of liquid with 1-square meter surface area; "BP" is for more than 1 mol of liquid

• "normal BP" liquid has 1 atm pressure; "BP" is at any other pressure

• "Normal BP" and "BP" are the same thing

• "Normal BP" is for 1g of liquid; "BP" is for any other amount

Surface tension occurs because of:

• surface area trying to increase

• air that is absorbed on the surface

• surface molecules have higher energy than molecules not touching the surface

• solute/chemicals are concentrated on the surface

• surface molecules have lower energy than molecules not touching the surface

Supercooling refers to a somewhat stable:

• liquid at a temperature that is below it's critical point

• liquid that is at a temperature below it's sublimation point

• gas that is at a temperature that is below it's critical point

• liquid that is at a temperature below it's freezing point

enthalpy of fusion is:

• the amount of heat required to melt a solid

• the amount of heat released when solid melts

• the amount of heat needed to fuse two atoms

• the amount of heat needed to vaporize a liquid

Which of these is INCORRECT?

• network covalent solids have covalent bonds throughout the crystal structure

• diamond and graphite carbons have sp3 hybridization

• diamond and graphite carbons have sp hybridization

• nanotubes and fullerenes are allotropic forms of carbon

there are NO crystalline solids that are held together by:

• dipole-dipole interactions

• ionic interactions

• pi bonds only

• hydrogen bonds

• covalent bonds

which of these examples is INCORRECT?

• table salt is an ionic solid

• copper wire is a metal solid

• iodine is a network covalent solid

• dry ice is a molecular solid