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Although both molecules are polar and have similar masses, the O-H bond in water is highly polar, producing a dipole movement in the overall molecule towards O. The S-H is also polar and produces a dipole movement towards S, but it is not as strong a separation of charge as that produced by O-H.

This results in H20 molecules being more strongly attracted to each other by Hydrogen bonding, than H2S molecules which are attracted to each other due to only dipole-dipole attraction.

Stronger attraction between molecules means it takes more energy to separate them into the gas phase, making it have a higher boiling point.

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12y ago
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12y ago

Oxygen attached to Hydrogen gives very strong Hydrogen bonding between molecules in the water. The partially positive hydrogen in one molecule is attracted to the partially negative oxygen in the next molecule in water. This means that water is a liquid. This is unusual for small /light molecules. Hydrogen sulphide does not have hydrogen bonding between molecules. Even though hydrogen sulphide is heavier than water it is a gas.

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13y ago

Oxygen attached to Hydrogen gives very strong Hydrogen bonding between molecules in the water. The partially positive hydrogen in one molecule is attracted to the partially negative oxygen in the next molecule in water. This means that water is a liquid. This is unusual for small /light molecules. Hydrogen sulphide does not have hydrogen bonding between molecules. Even though hydrogen sulphide is heavier than water it is a gas.

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11y ago

Due to inter molecular hydrogen bonding in H2O, it will have higher boiling point than H2Se (in which there is no hydrogen bonding).

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Q: Why boiling point of H2O is greater than H2S?
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Related questions

Why is the boiling point of H2O much higher than h2se?

Hydrogen bonding


Why is the boiling point of H2O higher than boiling point of H2S?

Because of hydrogen bonding. Oxygen, nitrogen, and fluorine have a high boiling point.


What is the boiling point of ethanal and water?

Boiling point of ethanal CH3CHO is 20.2 °C (293.3 K)Boiling point of water H2O is 100 oC (373.1 K)


What is the boiling point of any substance?

different substances have different boiling points, a main reference to boiling points is the boiling point of water (H2O) which is 100 degrees Celsius


Why is the boiling point of AsH3 lower thanNH3?

NH3 is more polar than AsH3, this is the same as comparing H2O and H2S.


Why boiling point of H2O is higher then HF?

Both H2O and HF possess H bonds as their intermolecular force but H bonds of HF are stronger than that of H2o. therefore boiling point of than that of H2O. But experimental boiling point is high in H2O than that of Hf


What is the bp of H2O?

The boiling point of water is 100 degrees C


What ithe boiling point of iron?

it depends on the sufficent amount of h2o


Why there are boiling range not boiling point?

I am not sure but may be it is because none of the substances have a fixed boiling point. The substance starts changing its state from liquid to gas before the mentioned boiling point . For example Boiling point of H2O is 100.but it change it changes its state before it.Therefore there are boiling range not boiling point.


What is the boiling point for H2O?

boiling point is 212 deg. Fahrenheit and freezes @ 32 deg. Fahrenheit.


Why does H2O have a higher point than CO2?

H2O (water) has a higher melting point and boiling point than CO2 because of the hydrogen bonds that exist between the water molecules. The hydrogen bonds are strong intermolecular forces (though they are classified as a weak bond), and help to hold separate water molecules together. Thus, the boiling point of water is higher than carbon dioxide, though they are similar in composition and mass.


HCl plus NaOH-NaCl plus H2O what is the balanced equation?

HCl + NaOH --> NaCl + H2O is balanced as you wrote it.But, since sodium is always soluble in water at temperatures below the boiling point of the solution, the net ionic equation for the reaction at temperatures lower than the boiling point would actually be: HCl + OH- --> Cl- + H2OOr, if the hydrochloric acid was already in solution, then simplyH+ + OH- ---> H2O