Water (H20) is a liquid at room temperature and atmospheric pressure whereas hydrogen sulfide (H2S) is a gas under the same conditions. Based on this information, what can you say about the intermolecular interactions in these two substances.

Question

So would this have to do with liquids having short-range ordering, whereas gases have long-range ordering? Thanks

Answer 1

No. It has all to do with hydrogen bonding. That occurs with O, N, and F.
HF has a much higher boiling point(higher than expected) than HCl; NH3 has a much higher boiling point (higher than expected) than PH3, and H2O has a much high boiling point (higher than expected) than H2S. Since H2S is a gas at room T you would expect H2O to be a gas also. But H2O is so much higher boiling that it is a liquid at room T.