Comparing the boiling points of: a) c3h8 b) c5h12 c) c2h5oh and identify the folowing statements as either true or false:
dispersion forces only for (a) boiling point (c) > boiling point (a) (b) exhibits hydrogen bonding boiling point (c) < boiling point (a) (a) exhibits hydrogen bonding boiling point (a) < boiling point (b) boiling point (b) < boiling point (c) dispersion forces only for (c) boiling point (b) > boiling point (c) dispersion forces only for (b) (c) exhibits hydrogen bonding boiling point (a) > boiling point (b)

Dispersion forces only for (A): True
Boiling point (C) > Boiling point (A): True, stronger intermolecular forces
(B) exhibits hydrogen bonding: False, no Hydrogen bonded to electronegative atom
Boiling point (C) < Boiling point (A): False, stronger intermolecular forces
(A) exhibits hydrogen bonding: False,  no Hydrogen bonded to electronegative atom
Boiling point (A) < Boiling point (B): True, stronger dispersion forces
Boiling point (B) < Boiling point (C): True, stronger intermolecular forces
Dispersion forces only for (C): False, also H-bonding
Boiling point (B) > Boiling point (C): False
Dispersion forces only for (B):  True
(C) exhibits hydrogen bonding: True
Boiling point (A) > Boiling point (B): False

It will fall off and tip over. 

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.