IG-Chap1-1

which state is air?

• solid

• liquid

• gas

• none

which state is ice?

• solid

• liquid

• gas

• none

which state is ethanol(乙醇，酒精) at room temperature?

• solid

• liquid

• gas

• none

ethanol(乙醇) and water, which one is more volatile ?

• ethanol

• water

• the same

which is NOT a fluid?

• air

• water

• salt

• methane(甲烷)

which describes the change

• solid to gas

• solid to liquid

• gas to solid

• gas to liquid

which describes the change: vapor to water

• freezing

• melting

• evaporation

• condensation

__________ is the temperature a liquid changes to solid at.

• melting point

• freezing point

• boiling point

impurities will increase the _________ of substances.

• melting point

• freezing point

• boiling point

• none

matter can be classified as pure substance and ____