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4 results for “vapour pressure”

Formulae (4)

a_w = \frac{p}{p_0}

Ratio of a food's vapour pressure to pure water — governs microbial spoilage.

e_s = 0.6108\,\exp\!\left(\frac{17.27\,T}{T + 237.3}\right)

The maximum water-vapour pressure air can hold at a given temperature (Tetens formula).

RH = \frac{p_v}{p_{sat}} \times 100

Vapour pressure as a percentage of the saturation pressure.

P_{\text{soln}} = x_{\text{solvent}} \, P^{\circ}_{\text{solvent}}

The vapour pressure of a solvent above a solution equals its mole fraction times the pure solvent's vapour pressure.