Question

vapour pressure formulae

Answer 1

In chemistry, vapor pressure is the pressure that is exerted on the walls of a sealed container when a substance in it evaporates (converts to a gas). To find the vapor pressure at a given temperature, use the Clausius-Clapeyron equation: ln(P1/P2) = (ΔHvap/R)((1/T2) - (1/T1)).

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Answer 2

Psolution = Xsolvent × P°solvent

Psolution = the vapour pressure of the solution

Xsolvent = the mole fraction of the solvent in the solution

P°solvent = the vapor pressure of the pure solvent at standard conditions