STOCKSCH 100 Lecture Notes - Lecture 26: Xylem, Boiling Point, Surface Tension

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The number of calories of energy required to raise the temperature of one gram of a substance one degree c. Water in the liquid state has a high specific heat. Water resists cha(cid:374)ge i(cid:374) te(cid:373)perature, it"s a good (cid:374)atural antifreeze for living things. Bodies of water are slow to heat up and slow to cool down. In plants, this protects the cells from rapid and drastic changes in temperature (plants are made up of 85-95% water: 2. The number of calories required for one gram of substance to change from liquid to gas (to evaporate) Water has a very high heat of evaporation (540 calories/g) Evaporation has a cooling effect on the environment because heat energy is used to change liquid water to vapor. Evaporation has a cooling effect on leaves and the surrounding air. When water vapor ***: 3. heat of fusion & un-fusion.

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