Why h2s is gas at room temperature

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After all, if the substance water just is the substance H2O, then any normal instance of the one should be a normal instance of the other. Water is a liquid while hydrogen sulphide is a gas because the hydrogen bonding in water causes the water molecules to be associated with each other due to intermolecular forces of attraction.

CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen.

Because of this reason CO2 is gas but SiO2 is solid. Anonymous answered. Both of them are made up of individual molecules and each molecule is covalently bonded electrons are shared, not transferred between each individual atoms.

Forces between the molecules intermolecular forces hold the molecules together. If there is some energy, the forces are not fully broken but the molecules can move to fill the shape of their container and is a liquid. If there is enough energy, the forces are broken and molecules are free to travel very fast anywhere and is a gas.