Explain why H2O is liquid and H2S is gas.

H2O is liquid and H2S is gas.

Why H2O exists as a liquid and H2S as a gas?

Because oxygen has a high electronegativity, water molecules are able to form hydrogen bonds with one another (second only to fluorine).

Therefore, hydrogen atoms from other molecules of water create a hydrogen bond with oxygen, resulting in intermolecular hydrogen bonding. This is because intermolecular hydrogen bonding requires oxygen.
Because sulphur has a lower electronegativity than oxygen does, hydrogen bonding is significantly weaker in the case of hydrogen sulphide (H2S). Hydrogen sulphide can be written as “hydrogen sulphide.”
Therefore, water exists in the form of a liquid at room temperature, whereas hydrogen gas takes the form of a gas.

2s 2px 2py 2p. SP3 hybridization. The bond angle for H2O is 105o. The H2S bond angle is closer to normal p orbitals (90o).

Why H2O is liquid but H2S a gas?

In simple Words: Oxygen is paramagnetic.

H2O definition and formula:

H2O is a molecular formula of water, also known as dihydrogen monoxide. It is a combination of two hydrogen atoms and one oxygen atom.

H2S definition and formula.

H2S is the abbreviation for the chemical substance known as hydrogen sulphide. It is a flammable chalcogen-hydride gas that is odourless and colourless. It is also poisonous and perishable.

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Underground mine gas is a word for gaseous mixtures containing hydrogen sulphide that have a terrible odour and are referred to as odorous. Carl Wilhelm Scheele, a Swedish chemist, is credited with finding the chemical makeup of refined hydrogen sulphide in the year 1777.


What happens when hydrogen sulfide enters the environment?

  • Hydrogen sulfide diffuses into the air as a gas.
  • Hydrogen sulfide stays in the atmosphere for about 18 hours.
  • When released as a gas, it converts to sulfur dioxide and sulfuric acid.
  • In some cases, it can be discharged as liquid waste from industrial facilities.

How does hydrogen sulfide affect health?

Hydrogen sulphide can cause irritation to the eyes, nose, and throat even when it is present in very low amounts. It may be tough to breathe for individuals who suffer from asthma. In just a few minutes, exposure to hydrogen sulphide concentrations of more than 500 parts per million (ppm) can render a person unconscious and even cause death.

In the vast majority of situations, it would appear that a person is able to regain consciousness without any additional apparent effects. On the other hand, there is a possibility that some people will experience chronic or long-term effects, such as headaches.

Poor ability to pay attention, remember things, and function motorically. Hydrogen sulphide has been studied extensively, and researchers have concluded that normal environmental amounts of the gas do not pose any threat to human health.

This page explains the chemical formulas for water and hydrogen gas, as well as the definitions of each. We really hope that reading this website clears up any confusion you may have had concerning the subject.

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