phasechanges

phasechanges - phase changes changes of the state of a...

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phase changes  - changes of the state of a substance vaporization - liquid to gas condensation - gas to liquid melting - solid to liquid freezing - liquid to solid deposition - gas to solid sublimation - solid to gas loss of movement >> loss of energy >> exothermic more movement >> gain of energy >> endothermic heat of fusion - energy needed to change solid to liquid o H fus heat of vaporization - energy needed to change liquid to gas o usually larger than heat of fusion since molecules must get rid of all intermolecular attractions when in transition from liquid to gas o H vap heating curve - temperature of system versus amount of heat added o temperature stops at the points where substance changes states o supercooling - temporarily cooling a liquid below its freezing point w/o it turning into a solid critical temperature - highest temperature at which a liquid phase can form distinct pressure
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This document was uploaded on 10/30/2011 for the course CHEM 161 at Rutgers.

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phasechanges - phase changes changes of the state of a...

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