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MECH 213 - 9.5.07

MECH 213 - 9.5.07 - On graph of different...

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MECH 213 – September 5, 2007 Properties of a Real Pure Substances o Contain only one substance o Water and refrigerant-134A are examples we will deal with Phases o Solids – molecular vibration but no free movement o Liquids – free movement but still fairly tightly bonded Volume increases (except for in water) o Vapors (gases) – free movement, high energy Compressed Liquid – liquid that has been put under enough pressure so that it will not change phase Saturated liquid – liquid that has been heated and is on the verge of becoming a vapor Saturated mixture (wet mixture) – contains both vapor and liquid Saturated vapor – point where condensation/vaporization is about to occur Superheated vapor – a vapor that is at its most energetic state
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Unformatted text preview: On graph of different pressures (Saturation Curve) o Anything to the left of the critical point is a saturated liquid o Anything to the right is a superheated vapor o Anything under the saturation curve is a wet mixture Temperature and pressure cannot define system because they are not independent MUST BE ABLE TO DRAW T-v Diagram (Temperature-Volume) o Would almost lie on top of the saturation curve o Know three regions, constant pressure lines, critical point P-v Saturation Curve o Only difference between T-v and P-v is the constant temperature line of the P-v diagram P-T Phase Plot o Triple point – point where all three phases exist...
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