<Dd> R H = p s p 0 × 100% = S × 100% (\ displaystyle RH = (\ frac (p_ (s)) (p_ (0))) \ times 100 \% = S \ times 100 \%) </Dd> <P> where p s (\ displaystyle p_ (s)) is the saturation vapor pressure above a particle at equilibrium (around a curved liquid droplet), p is the saturation vapor pressure (flat surface of the same liquid) and S is the saturation ratio . </P> <P> Kelvin equation for saturation vapor pressure above a curved surface is: </P> <Dl> <Dd> ln ⁡ p s p 0 = 2 σ M R T ρ ⋅ r p (\ displaystyle \ ln (p_ (s) \ over p_ (0)) = (\ frac (2 \ sigma M) (RT \ rho \ cdot r_ (p)))) </Dd> </Dl>

What are the phases of an aerosol spray