Molar Heat of Fusion - Molar Heat of Fusion Molar Heat of Fusion amount of heat energy required to melt one mole of solid at its melting point o o Heat

Molar Heat of Fusion - Molar Heat of Fusion Molar Heat of...

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Molar Heat of Fusion - Molar Heat of Fusion – amount of heat energy required to melt one mole of solid at its melting point o Heat absorbed increases potential energy as particles are pulled apart o Decrease in particle arrangement - Magnitude depends on attraction between solid particles o Particles of the liquid and solid have the same kinetic energy o Loss of potential energy o Energy decrease, increase of particle order - Solid + heat liquid [ melting ] - Solid + heat Liquid [ equilibrium ] - Adding heat to a system shifts equilibrium to the right o Increase in liquid and decrease in ice o Temp does not increase until ice is melted Sublimation and Deposition
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Unformatted text preview: -Solid + heat energy ↔ vapor-Sublimation – change of state from a solid directly to a gas -Deposition – change of state from a gas directly to a solid I. Phase Diagrams-Phase diagram – a graph of pressure vs. temperature that shows the conditions under which the phases of a substance exists o Reveals how states of a system change with changing temperature or pressure o Triple point – indicates the temperature and pressure conditions at which the solid, liquid, and vapor of the substance can coexist at equilibrium o Critical point – indicates the critical temperature and critical pressure...
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