Physical Chemistry Chapter 5 - Enthal pies of transition Transition rocess Symbol ●| Transition Phase a→> Phaseβ trs H Fusion s->l Enthalpies Mush Vaporization 1g ofphysical △,H e sublimate s→ change Mixing of fluidsPure >mixture AH mIX Solution Solute→> solution SOl Hydration x(g)→>X(aq) .Atomization Species(s, g)atoms(8)4aH
Enthalpies of transition Transition Process Symbol Transition Fusion Vaporization Sublimation Mixing of fluids Solution Hydration Atomization Phase → Phase s→l l→g s→g Pure → mixture Solute→solution X (g)→X(aq) Species(s,l,g)→atoms(g) trsH fusH vapH subH mixH solH hydH atH Enthalpies of physical change Physical Chemistry Chapter 5
Physical Chemistry Chapter 5 Enthalpies of transition Transition Process ymbo Transition Phase→> Phaseβ AH trs onization (g)→>X(g)e(g) lon Electron gain X(g+e(g)->X(g) AH Reaction Reactants→> products H Combustion Compound(S,4, g)+02(g)AH →>CO2(g),H2O(l,g) Formation Elements→ compound Activation Reactants->activated 4H complex
Enthalpies of transition Transition Process Symbol Transition Ionization Electron gain Reaction Combustion Formation Activation Phase → Phase X (g)→X+ (g)+e- (g) X (g)+e- (g)→X- (g) Reactants→products Compound(s,l,g)+O2 (g) → CO2 (g),H2O(l,g) Elements→compound Reactants→activated complex trsH ionH egH rH cH fH H Physical Chemistry Chapter 5
Physical Chemistry Chapter 5 Enthalpies of physical change Standard enthalpy of vaporization The enthalpy change per mole when a pure liquid at 1 bar vaporizes to a gas at 1 bar H2O1)→H2O(g△a0=+4066m0at373K Standard enthalpy of fusion The enthalpy change accompanying the conversion of a solid to a liquid h20(→20D△mFP(273K)=+601/mol
Standard enthalpy of vaporization The enthalpy change per mole when a pure liquid at 1 bar vaporizes to a gas at 1 bar H2O(l) → H2O(g) H k J mol at K o vap = +40.66 / 373 Standard enthalpy of fusion The enthalpy change accompanying the conversion of a solid to a liquid H2O(s) → H2O(l) H K kJ mol o fus (273 ) = +6.01 / Enthalpies of physical change Physical Chemistry Chapter 5
Physical Chemistry Chapter 5 Enthalpies of physical change Standard enthalpy of sublimation The standard enthalpy for a process in which a solid is converted directly into a vapor C(. graphite)→C(g)△wH°(298K)=+71668/J/mol Standard enthalpy of solution The standard enthalpy change when it dissolves in a specified quantity of solvent HCl(g)→HCl(ag △,H°=-75.14J/mOl
Standard enthalpy of sublimation The standard enthalpy for a process in which a solid is converted directly into a vapor. C(s,graphite) → C(g) H K k J mol o sub (298 ) = +716.68 / Standard enthalpy of solution The standard enthalpy change when it dissolves in a specified quantity of solvent. HCl(g) → HCl(aq) H kJ mol o sol = −75.14 / Enthalpies of physical change Physical Chemistry Chapter 5