Thermodynamics and Bond Energy Terms

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5 Terms

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thermodynamics

the branch of chemistry and physics that studies energy transfer accompanying physical and chemical processes

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∆H_rxn

a change in enthalpy of a reaction

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bond energy and -∆H_rxn relationship

the energy released during the formation of product bonds is greater than the energy released to break reactant bonds; exothermic

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bond energy and +∆H_rxn relationship

the energy required to break the reactant bonds is greater than the energy released to form product bonds

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bond energy

the amount of energy required to break one mole of bonds in a gaseous substance, to form gaseous products at the same temperature and pressure. it can be used to estimate the ∆H_rxn only for gas phase reactions.