GEO3020/4020 Lecture 2: I. Energy balance II. Evapotranspiration. Repetition. 70%. 30%. Energy balance equation. where: K net shortwave radiation L net longwave radiation LE latent heat transfer H sensible heat transfer G soil flux Aw advective energyBy blade
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Latent Heat. Thermal Physics Lesson 2. Learning Objectives. Define specific latent heat. Perform calculations using ∆Q=ml. Describe how specific latent heat of fusion/vaporisation can be measured in the lab. Explain why energy is needed to evaporate a liquid/melt a solid. Safety.
Latent Heat. Solid. Gas. Phases of Matter. The properties of solids, liquids, and gases differ. How does matter change state?. Liquid. Watched Pot. You want to cook a pot of potatoes in boiling water. To use energy most efficiently, you should
Latent Heat. Physics Montwood High School R. Casao. Change of State. Matter exists in 3 states: Solid Liquid Gas. Consider water:. vaporization (takes place at boiling point). fusion (at melting point). ice. water. steam. solidification. condensation. at freezing point.
Latent Heat. Changes in State. Energy and States of Matter. The energy and organization of the particles in a sample of matter determine the physical state, or phase , of the matter: solid, liquid, or gas. Energy and States of Matter.
Latent Heat. When a solid melts or a liquid boils, energy must be added but the temperature remains constant! (This can be explained by considering that it takes energy to break the bonds holding the material together.)
Latent Heat. Materials can also go through a change in state called a phase change. Changes between solid, liquid, gaseous and plasma states.
Water flux Evaporation rate, E (mm/day). Energy flux Latent heat flux (W/m 2 ), H l. Latent heat flux. r = 1000 kg/m 3 l v = 2.5 MJ/kg. 28.94 W/m 2 = 1 mm/day. Area = 1 m 2. Energy Balance of Earth. 70. 20. 100. 6. 6. 26. 4. 38. 15. 19. 21. Sensible heat flux 7