What is vapor pressure of gases?

Vapor pressure or equilibrium vapor pressure is the pressure of a vapor in thermodynamic equilibrium with its condensed phases in a closed container. All liquids and solids have a tendency to evaporate or sublime into a gaseous form and all gases have a tendency to condense back to their liquid or solid form. The equilibrium vapor pressure is an indication of a liquid's evaporation rate. It relates to the tendency of particles to escape from the liquid (or a solid). A substance with a high vapor pressure at normal temperatures is often referred to as volatile.

Vapour Pressure Formula

X solvent = the mole fraction of the solvent in the solution.

P solution = the vapour pressure of the solution.

P°solvent = the vapour pressure of the solvent.

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Explanation:

it's c. elements are placed in rows based on how may valencies electrons have.

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