Hello. Suppose you dissolve something in water. I know that the boiling point should increase because as the water boils the solute's entropy decreases, and the net entropy should increase. Now suppose, that I dissolve GI chlorides in the water. Each solution of the salt has the concentration, and because they are all from the same group they should react similarly. As I go down the group, the size of the particles increases. My question is as this particle size increases, how does the increase in boiling point change? My guess is that as solute size increases, the solution's particles have less possible arrangements, so its entropy will decrease. Thus the boiling point will increase with size. Is that correct? And are there any other factors? Also, if I was to conduct a fair test of this, is it more important to keep the number of moles constant or the mass of the solute constant. Finally, is this a trend specific to G1 chlorides, or does it depend on the salt, and on the group? Thank you for answering my questions. Also, if you know of sources for such data, I would appreciate if you could post them as well.