Lecture 15 F 2010

Lecture 15 F 2010 - Lecture 15: Chapter 7, Water and...

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Lecture 15: Chapter 7, Water and Atmospheric Moisture The Heat Properties of Water For water to change from one state to another (solid, liquid, or vapor), ___________________ must be absorbed or liberated (released). A change from one state to another is called a ______________. To cause this, the amount of heat energy must be sufficient to affect the hydrogen bonds between molecules. The exchange between physical states of water provides more than 30% of the energy that powers the general circulation of the atmosphere, so, as shall be seen, it is an important part of weather and climate. The phase changes are: __________: change from ice (solid) to water (liquid) __________: change from water (liquid) to ice (solid). Ice forms crystals, no two of which are alike. __________: change from vapor (gas) to water (liquid) __________: change from water (liquid) to vapor (gas) __________: direct change from ice (solid) to vapor (gas) or direct change from vapor to ice. Matching: 1. Melting 2. Freezing 3. Condensation 4. Evaporation 5. Sublimation A. change from vapor (gas) to water (liquid) B. direct change from ice (solid) to vapor (gas) or direct change from vapor (gas) to ice (solid). C. change from water (liquid) to ice (solid). D. change from ice (solid) to water (liquid) E. change from water (liquid) to vapor (gas) Energy involved in moving from one phase to another. To change from one phase to another, heat energy has be absorbed or released. Turn water to ice (freezing): lose 80 calories (that is, __________) Turn ice to water (melting): gain 80 calories (that is, ___________) Turn water at 100 degrees to gas (vaporization/evaporation): gain 540 calories; to turn water at 0 degrees to gas: gain 640 calories (that is, _______________) Turn gas to water (condensation): lose 540 calories (that is, ___________) Turn ice to gas (sublimation): gain 720 calories (that is, _______________). So heat energy is absorbed when? A. Melting B. Freezing C. Condensation D. Evaporation Heat energy is released when? A. Melting B. Freezing C. Condensation D. Evaporation
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Humidity Humidity refers to ________________________ in the air The amount of water vapor air can hold depends mainly upon the _________________ of the air. The warmer the air, the more water vapor it can hold. The cooler the air, the less it can hold. Relative humidity
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This note was uploaded on 02/01/2011 for the course GEOG 1112 taught by Professor Kumar during the Fall '08 term at Georgia State.

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Lecture 15 F 2010 - Lecture 15: Chapter 7, Water and...

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