The Heat/Cooling Curve of a Pure Substance
Description of the diagram
A A-B
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| The particles are closely packed together and can only vibrate at a fixed position. It stays solid anywhere below its meling point. B |
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The particles in the solide are being heated and the heat enrgy is converted to kinetic enrgy. Thus the particles vibrate faster and move further apart. B-C |
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Solid has begun melting but the temperature remains the same C |
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At solid at its melting point. it is in both solid and liquid state. The temperature remins constant becuase it is used to over come forces between the particles C-D |
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| Turn to full liquid state. D |
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Liquid is heated and molecules begans to move faster due to the kinetic energy in the increase of temperature D-E |
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| Molecules recieves enough energy to to overcome forces between particle. Some liquid molecules begin to change into gas E |
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| Evaporation begins. E-F |
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| Liquid has turn all into gas |
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| Temperature increases as heating continue.Gas particles are moving much fast do to much bigges space |
Text Book Summary
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