CHEM 104 Lecture Notes - Lecture 27: Vaporization, Lead, Supersaturation
Document Summary
Fusion enthalpy = (cid:4666) (cid:2916)(cid:2931)(cid:2929)h(cid:4667) : quantity of heat energy transfer to a solid as it melts at constant pressure. J/g pressure to convert a liquid to a vapor (cid:4666) (cid:2916)(cid:2931)(cid:2929)h(cid:4667) = (cid:2916)(cid:2928)(cid:2915)(cid:2915)zi(cid:2924)(cid:2917)h ( (cid:2932)a(cid:2926)h) = (cid:2913)(cid:2925)(cid:2924)(cid:2914)(cid:2915)(cid:2924)(cid:2929)a(cid:2930)i(cid:2925)(cid:2924)h. Vaporization enthalpy = ( (cid:2932)a(cid:2926)h) : quantity of heat energy transfer at constant. Standard reaction enthalpy (cid:4666) rh(cid:4667) : unmixed reactants at the standard pressure of 1 bar and a specific. The enthalpy of pure, unmixed reaction products minus the enthalpy of pure, temperature. Ex: rxn of br with al, rusting of fe, combustion of gasoline. Most or all of the reactants are eventually converted to products without continuous outside intervention. Other rxns have no tendency to occur by themselves. Reactant-favored: when equilibrium has been reached, if reactants dominate over products. Unless there is some continuous outside intervention, a reactant-favored process does not produce large amounts of products. A reactant-favored process can be forced to produce products if sufficient energy is supplied.
