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thermodynamics
the branch of chemistry and physics that studies energy transfer accompanying physical and chemical processes
∆H_rxn
a change in enthalpy of a reaction
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
bond energy and +∆H_rxn relationship
the energy required to break the reactant bonds is greater than the energy released to form product bonds
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.
