Which one of the following nonpolar molecules has the highest boiling point? Whi

Question

Which one of the following nonpolar molecules has the highest boiling point? Which ONE is NOT an ionic solid? NaCl (sodium chloride) MgSO_4 (magnesium sulfate) K (potassium) CacO_3 (calcium carbonate) Al(NO_3)_3 (aluminum nitrate) Why does hydrogen fluoride (HF) have an unusually high normal boiling point compared to the other hydrogen halides? The H_F bond in hydrogen fluoride is very strong. Hydrogen fluoride has very strong London dispersion forces. Hydrogen fluoride is capable of forming hydrogen bonds. Hydrogen fluoride is ionic Hydrogen fluoride is covalent. For a mole of water (H_2O), which process requires the greatest input of energy? Melting Condensation boiling freezing decomposition into H_2 and O_2

Explanation / Answer

1.all the molecules are non-polar so boiling point depends only on molecular wieght.Higher the molecular weight more is the boiling point as they have stronger Van der waals force of interaction. So CS2 have the highest boiling point among the given molecule.

2.) K is not a ionic solid. as it have bonding with the same electropositive K atom.

3)HF have unusually high boiling point due to the H-F bonds in HF is very strong.

4.) All the process are spontaneous in nature for H2O. But decomposition of H2O to H2 and O2 is really difficult and requires the greatest input of energy.

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