Phases and Phase Changes - Regents

Which phase change is endothermic?

• boiling

• deposition

• freezing

• condensation

Which phase changes are endothermic?

• condensation and deposition

• melting and freezing

• melting and evaporating

• condensation and sublimation

Which phase change is accompanied by the release of heat?

• H₂O (s) --> H₂O (g)

• H₂O (s) --> H₂O (l)

• H₂O (l) --> H₂O (g)

• H₂O (g) --> H₂O (l)

Which process is exothermic?

• boiling of water

• melting of copper

• condensation of ethanol vapor

• sublimation of iodine

Which phase change is accompanied by the release of heat?

• H₂O (s) --> H₂O (g)

• H₂O (s) --> H₂O (l)

• H₂O (l) --> H₂O (g)

• H₂O (l) --> H₂O (s)

Which 5.0 mL sample of CH₄ will take the shape of and completely fill a closed 100.0 mL container?

• CH₄ (s)

• CH₄ (l)

• CH₄ (g)

• CH₄ (aq)

When a substance is made up of constantly vibrating particles arranged in a regular geometric pattern, the substance is classified as a

• solid

• liquid

• gas

• plasma

Which sample of CO₂ has a definite volume and no definite shape?

• CO₂ (aq)

• CO₂ (g)

• CO₂ (l)

• CO₂ (s)

When a sample of CO₂(s) becomes CO₂(g), there is a change in

• bond type

• gram-formula mass (GFM)

• molecular polarity

• particle arrangement

In which 1.0 gram sample are the particles arranged in a crystal lattice?

• CaCl₂ (s)

• C₂H₆ (g)

• CH₃OH (l)

• CaBr₂ (aq)