1) When heat is added to a substance, what happens to its particles? a) Get closer together b) Slow Down c) Move Farther apart d) They Disappear  2) In which phase change do the intermolecular forces WEAKEN?  Choose all that apply a) melting (solid to liquid) b) freezing (liquid to solid c) evaporation (liquid to gas) d) condensation (gas to liquid) 3) Which force is overcome/broken when a substance evaporates (liquid to gas)? a) Intermolecular force b) Intramolecular Force c) Nuclear Force 4) In the phase change shown, the intermolecular forces between particles are:  a) Getting stronger b) Getting weaker c) Remaining the same 5) When water molecules evaporate, which of the following occurs? a) The hydrogen and oxygen atoms split up and spread farther apart b) The water molecules spread apart in groups of combined Hydrogen & Oxygen stay together c) The molecules come closer together 6) True or False: All substances have the same melting point. (Melt at same temperature) a) True b) False 7) Which of the labeled attractions is an INTERmolecular force? a) A b) B c) Both d) Neither

AMian Forces & Phase Changes

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