Table of Contents
Why the boiling point of H2S is less than H2O?
H2S molecules are involved in weaker hydrogen bonding than H2O molecules. This is because of the lower electronegativity of sulphur than oxygen. So, less energy is required to break the hydrogen bonds in H2S. Thus, the boiling point of H2S is lower than that of H2O.
Why does H2O have a higher boiling point than H2?
The difference in boiling points is down to H2O having stronger inter-molecular forces, including hydrogen bonding, which is the strongest of all the inter-molecular forces. H2 on the other hand, only contains van der Waals forces, which are the weakest of all the inter-molecular forces.
Why H2O is high boiling liquid while H2S is gas?
H2O is liquid because of its ability to form hydrogen bonds which is possible only in case of F , O and N because of their high electronegativity. While in case of H2S there is no hydrogen bond formation . Hence H20 is liquid while H2S is gas .
Does H2O or H2S have a higher boiling point?
Between water and hydrogen sulfide, both are polar, and have dipole-dipole forces, so they have higher boiling points than methane or silane. But water has hydrogen bonds, which are extra-strong dipole-dipole forces. Water boils much hotter than hydrogen sulfide.
Why does H2S have lower boiling point than H2S?
This essentially means H2Se is a bigger molecule than H2S meaning the Van Der Waal forces (London forces) on H2Se is stronger than on H2S which means it takes more energy to break the intermolecular forces for H2Se than H2S- this leads to H2S having the lower boiling point.
Why does H2O have highest boiling point?
Water has an unusually high boiling point for a liquid. Water is made up of oxygen and hydrogen and can form hydrogen bonds, which are particularly strong intermolecular forces. These strong intermolecular forces cause the water molecules to “stick” to one another and resist transition to the gaseous phase.
What has higher boiling point than water?
Hence the force of attraction between two water molecules is greater than it is between two methane molecules. Water has the higher boiling point. Now let’s compare methane and dihydrogen. We could invoke the same argument here that we did in comparing methane and water.
Why is boiling point of H2O higher than NH3?
H2O has a higher boiling point than NH3 because (i) the H-bonds are stronger and (ii) it contains twice as many H-bonds. H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker. Only weak dispersion forces act in CH4 and CH3CH3.
Why is H2O stronger than H2S?
The H–F bond is more polar than H–O so is easier to break HF into H+ and F- than to break H2O into H+ and OH-. S is much larger atom than O, so the H–S bond is much longer and weaker than H–O; hence H2O is weaker acid than H2S.
Why does H2S have a higher boiling point than HCl?
Both HCl and H2S have 18 electrons, BUT the area over which they are spread in H2S is greater than for HCl. Therefore, we can conclude that H2S has greater London dispersion forces which contribute to the higher boiling point.
Is H2O has higher boiling point?
H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker.