For the first question, we desire to look at potential intermolecular pressures that are acting to organize the molecule together. The one v the weakest IMF will have the lowest boiling point.

You are watching: Which compound has the lowest boiling point

CH4 has only dispersion forces while every the others have actually dispersion PLUS one of two people dipole-dipole (HCl, H2S, NH3), and/or hydrogen bonding (NH3). So, CH4 will have actually the lowest boiling point.

For the second question, we want to look because that the molecule that dissociates/ionizes into the most number of ions. This will certainly be NaCl(l) due to the fact that solids don"t perform so and also H2O(g) just ionizes ever so slightly.

So, the price is NaCl(l) is the best conductor.

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Salo O.

Hello, thank you! Also, for the 2nd question, can you determine the answer by finding what pressures the molecule has, even if it is it is dispersion or dipole-dipole or hydrogen bonding and then determine the finest conductor of electricity?

J.R. S.

not really. As much as electrical conductivity, friend are more interested in intramolecular pressures than you are in intermolecular forces, and additionally the number of ions present. For example, 1 M CaCl2 is a much better conductor 보다 1 M NaCl since it produces an ext ions.

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