Heating and Cooling Curves

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Heating/Cooling Curve and Phase Diagrams
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Presentation transcript:

Heating and Cooling Curves Goal: the goal of this video is to be able to describe the three phases of matter and phase changes through a heating/cooling curve

What are some things that happen as we heat a sample up? Solid  Liquid  Gas Melting, boiling

What is the heating curve? The heating curve is a graph which represents how a sample changes phases. As heat is added over time, the sample changes temperature and phase accordingly. Thus heating curve. Temperature °C HEAT 

Changes of state – heating curve gas boiling liquid  gas temperature liquid melting solid  liquid solid time

Changes of state – cooling curve temperature time gas condensing gas liquid liquid freezing liquid  solid solid

Evaporation vs. Boiling Boiling is a phase change of a WHOLE substance from liquid to gas Evaporation is a molecule on the surface escaping mainly during the liquid phase

The heating and cooling curves are show changes in temperature and energy. They give us detailed information about phases and phase changes of samples. NOW YOU KNOW…

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