8 2. Latent heat is released when dew forms (water vapor condenses) 3. The dew point temperature then decreases, as there is less moisture in the air. This allows the temperature to continue falling 9. Condensation Processes a. Cloud condensation nuclei – Naturally occurring particles in the atmosphere on which water molecules condense b. Hydrophobic particles – Don’t specifically attract water molecules c. Hygroscopic particles – special affinity for forming water droplets, even when atmosphere is not saturated (i.e. Salt) d. Adiabatic process – takes place without transfer of heat between system and surrounding. i. Air warms when it compresses, and cools when it expands. ii. Dry Adiabatic Lapse Rate – Air cools at the rate of 5.5*F per 1000ft., or 10*C per 1km as it rises. Due to pressure decreasing with height, air expands as it rises. iii. Moist Adiabatic Lapse Rate – 3.3*F per 1000ft., or 6*C per 1km. this is an average number, affected by temperature and pressure conditions. e. First Law of Thermodynamics states that temperature is affected by adding or
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Atmospheric thermodynamics, Water vapor, fog, Cumulus cloud