latent heat + phase diagrams

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6 Terms

1
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latent heat

the energy transfer required per gram of substance to undergo a phase change

2
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latent hear of fusion

freezing= -Lf

melting= +Lf

3
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latent heat of vaporization

evaporation= +Lv

condensation= -Lv

4
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phase diagrams

  • solid to gas- sublimation

  • gas to solid- deposition

  • liquid to solid- freezing

  • solid to liquid- melting

  • liquid to gas- evaporation

  • gas to liquid- condensation

<ul><li><p>solid to gas- sublimation</p></li><li><p>gas to solid- deposition</p></li><li><p>liquid to solid- freezing</p></li><li><p>solid to liquid- melting</p></li><li><p>liquid to gas- evaporation</p></li><li><p>gas to liquid- condensation</p></li></ul><p></p>
5
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delta h and s are positive

T high- delta g negative

T low- delta g positive

6
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delta h and delta s both negative

T high- delta G positive

T low- delta G negative