Hydrogen bonding boiling point effect

Even though H2O has the lowest MW of all three compounds, the hydrogen bonds outweigh any effects of MW or polarity. 1 point for stating that hydrogen bonds result in very high boiling points. 

Hydrogen bonding has tremendous effects on molecular properties. It is the strong hydrogen bonding in water that makes its boiling point of 100 °C some 160 °C higher than the heavier H2S, simply... 

The unusual properties of water, which come from its network of hydrogen bonds, have profound effects on life on earth. Figure 10.12 compares the boiling points of water and hydrides that lack hydrogen bonds. An extrapolation of the trends from the latter compounds would give a boiling point for water without hydrogen bonds near 150 K (-123°C). Life as we know it would not be possible under these circumstances. 

Although there are van der Waals forces between water molecules, the effect of the hydrogen bonding is much stronger than that of the van der Waals forces. For this reason, the boiling point of water is higher than expected. 

You can see the effect of hydrogen bonding clearly in the boiling point data of the binary hydrides of Groups 14 to 17 (IVA to VIIA), shown in Figure 4.16. In Group 14, the trend in boiling point is as expected. 

Properties that are related to melting point and boiling point also show the effect of hydrogen-bond formation this is illustrated for the molal heat of vaporization in Figure 12-3.lt... 

The effect of the weak hydrogen bond on the boiling point of catechol is noticeable. The substance boils at 245 C, whereas the boiling point of resorcinol is 277° and that of hydroquinone 285°. v... 

Molecules in polar liquids such as water, liquid ammonia, sulfuric acid, and chloroform are held together by dipole-dipole and hydrogen bonding interactions. For molecules of comparable size, these are stronger than London forces resulting in the familiar trends in boiling points of nonmetal hydrides. For the heavier molecules, such as H2S, H,Se, PH3, and HI, dipole effects are not particularly important (the elec-... 

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