Question

Why is h2o a liquid and h2s a gas?

Answer 1

Answer:

In H2O there is hydrogen bonding because oxygen has a high electronegativity. So, the hydrogen atoms from other molecules of water form a hydrogen bonds with oxygen resulting in intermolecular hydrogen bonding. Therefore at room temperature, H2O is a liquid and H2S is a gas

In H2O there is hydrogen bonding between the molecules because oxygen has a high electronegativity(only second to fluorine).

So, the hydrogen atoms from a water molecule forms hydrogen bonding with oxygen of neighbouring water molecule resulting in strong intermolecular hydrogen bonding. This is why water is in liquid form at room temperature

While in case of H2S, the electronegativity of sulphur is low compared to oxygen so, the hydrogen bonding is negligible in case of H2S, and the only binding force is weak Van Der Waals or London force of attraction between the molecules. Therefore H2S is a gas at room temperature.

Explanation:

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Answer 2

Answer:

Because of higher electronegativity of oxygen compared to sulphur.

Explanation:

H₂O has hydrogen bonding because oxygen has a higher electronegativity than sulphur. So, the hydrogen atoms from other molecules of water form  hydrogen bonds with oxygen resulting in intermolecular hydrogen bonding. Therefore at room temperature, H₂O is a liquid and H₂S is a gas.