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Unformatted text preview: – formation process no ΔT =-( )+ = ∞ ∆G 4πRp33vLln S 4πRp2σ S ppsat < ; ; > ; ~ S 1 subsaturated ΔG 0 ΔG R p ; droplet cannot grow > ; ; S 1 supersaturated for a critical R p , < ; ΔG 0 droplet grows R p * = , critical radius size of droplet at equilibrium – Significant point clouds can only grow if aerosols with R p > R p * are in ! atmosphere Determining R p *: ∂ ∂ = Set ∆G Rp 0 *= ( )= ( ) Rp 2σvLkTln S 2σMRTρLln S A higher the atmospheric saturation will reduce the necessary R p * Kelvin Equation ( ), In a curved surface situation water droplet molecules are packed less , -. densly and have less intra attraction than the flat surface case . Molecules then have an easier time escaping a curved surface...
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- Winter '10
- Surface tension, Vapor pressure, Water vapor, saturation vapor pressure, Kelvin Effect