Just to make sure I'm on the right track here, is it correct to say that larger molecules have a higher heat of vaporization/condensation than smaller molecules? I figure that since larger molecules have stronger dispersion forces, it takes more energy for them to break free of one another.
You're right, in general, but you know that "in general" covers us when exceptions occur. How the molecules are arranged in space and their polarity hav an effect also. You would expect CH4 to boil at a lower temperature than C2H6 or C3H8 or C4H10. But there a multiple ways to put C3H8 and C4H10 together (caller isomers). You may not have talked about isomers yet.
