EAS212 Lecture Notes - Lecture 11: Latent Heat, Photic Zone, Sensible Heat
1 Feb 2018
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Eas lecture 11: heat energy and phase changes: heat energy and phase changes: It takes the same amount of energy to go from freezing to melting and vice versa, no energy is lost in the process. Heat properties of water: heat capacity: the amount of heat needed to heat 1g of a substance 1c. When ice reaches its melting point, adding more energy (heat) does not change the temperature; once 333. 5 j/g of ice have been added, the substance melts. Latent heat of melting for ice = 333. 5 j/g: sensible heat: heat that raises or lowers the temperature of an object but does not change its phase. Note: twice that of ice and water vapour. Energy needed to evaporate a substance: heat capacity of water vapour: 2. 1 j g-1 c-1, amounts are also the amount of heat needed to be removed to cool, condense or freeze. *the majority of energy is being used during the phase, vs when changing temperatures.
