chapter_02 - Chapter2 Energy:Warmingthe Earthandthe Atmosphere I.Energy,Temperature,andHeat n n n PotentialEnergy n KineticEnergy n InternalEnergy n Fi

chapter_02 - Chapter2 Energy:Warmingthe Earthandthe...

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Click to edit Master subtitle style Chapter 2 Energy: Warming the  Earth and the  Atmosphere
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I. Energy, Temperature, and Heat n Energy from the sun drives weather n Energy  is the ability or capacity to do  work on some form of matter n Potential Energy n Kinetic Energy n Internal Energy n First law of thermodynamics
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What is Temperature? n Temperature: a measure of the average  speed of the atoms and molecules of an  object Click here to activate this figure
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What is Heat? n Heat: the transfer of energy due to  temperature differences n Specific Heat: heat capacity of a  substance per unit mass
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Latent Heat – The Hidden Warmth n Latent Heat: heat energy required to change a  substance from one state to another n Water can exist as a vapor, water, or ice n Sensible heat is felt, whereas latent heat is not, rather  stored or “hidden”
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Latent Heat – The Hidden Warmth n Evaporative Cooling n Consider a water droplet with some  molecules evaporating… n Condensational Heating  n   Consider a water droplet forming…
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Latent Heat has a role in the  Atmosphere? n Provides energy for storms n Distributes heat from the tropics to the  poles
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The latent heat released in this cloud formation is equivalent to a small atomic bomb!
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II. Heat Transfer in the Atmosphere n Heat is transferred from warmer to colder  objects n How does temperature difference relate to  heat transfer? n 3 Mechanisms n Conduction n Convection n Radiation
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Heat Transfer - Conduction n Conduction: transfer of  heat by molecular  contact n What does it mean to be  a good conductor?
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