Chem Test 4 Concepts - Work is o o Organized molecular...

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Work is o Organized molecular motion o Work is organized molecular motion since it is a displacement of a solid against a force For a reaction in which gases are neither produced nor consumed, ΔH is o The same as ΔE o For a reaction at constant temperature and constant pressure, ΔE = ΔH – (Δn)RT. If gases are neither produced nor consumed, Δn will be zero, so ΔE must equal ΔH. A property that determines the direction of heat flow is o Temperature o Heat flows spontaneously from a hotter body to a colder body. In other words, heat flows from a body of high temperature to a body of lower temperature If the products of a reaction have a higher energy than the reactants, then the reaction o is endothermic o Energy must- flow into the system for the products to have a higher energy than the reactants. ΔH will be positive and the reaction will be endothermic What is the total motional contribution to the molar internal energy of gaseous BF3? o
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Chem Test 4 Concepts - Work is o o Organized molecular...

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