Question

Consider the compounds cl2 hcl f2 naf and hf. which compound has a boiling point closest to that of argon?

Answer 1

The answer is F2, it has the boiling point that is closest to Argon.
Cl2 is a molecule that is larger than F2 so it has larger london dispersion forces than F2 and NaF has high boiling point as it is an ionic compound and HCl and Hf both also have high boiling point. Argon has very low boiling point so F2 has the boiling point that is closest to the Argon.

Answer 2

Answer:

F₂

Explanation:

The boiling point depends on the molecular mass of the compound and the intermolecular forces. As stronger the forces, as higher will be the boiling point. Compounds with close molar mass thus intend to have close boiling points.

The molar mass or argon is 40 g/mol, and for the compounds given:

Cl₂ = 2*35.5 = 71 g/mol

HCl = 1 + 35.5 = 36.5 g/mol

F₂ = 2*19 = 38 g/mol

NaF = 23 + 19 = 42 g/mol

HF = 1 + 19 = 20 g/mol

So, F₂ and NaF have the closest molar mass to argon, but NaF is an ionic compound, which has strong forces, so it's solid in the ambient temperature. F₂ has weak London forces because is a nonpolar molecule. Thus, because argon is a gas at the ambient temperature, F₂ would have the closest boiling point.