8 Thermo-Chemistry& Chemical EquilibriumObjective. Thermo-effect in chemical reaction and evaluation ofreaction heat Theoretical adiabatic combustion temperature. Chemical equilibrium and equilibrium constant Judgment on direction and limitation of chemical reaction Evaluation on equilibrium constant and dissociation
8 Thermo-Chemistry & Chemical Equilibrium Objective • Thermo-effect in chemical reaction and evaluation of reaction heat • Theoretical adiabatic combustion temperature • Chemical equilibrium and equilibrium constant • Judgment on direction and limitation of chemical reaction • Evaluation on equilibrium constant and dissociation
8.1 1st Law Analysis of Chemical Reaction8.1.1 Internal Energy and EnthalpyPotentialUPhysicalphKineticInternalEnergyDependsoncomponentsUChemicalchIrreverent totemperatureUUU=chphH=H+Hchph
8.1 1st Law Analysis of Chemical Reaction 8.1.1 Internal Energy and Enthalpy Internal Energy Physical Chemical Potential Kinetic U ph Depends on components Irreverent to temperature Uch U U U = + ph ch H H H = + ph ch
8.1 1st Law Analysis of Chemical Reaction8.1.2 Work of Chemical ReactionWVolumetricWorkWork-wNon-volumetric WorkExample:ElectricitybyFuelCellWor =W+Wfo1
8.1 1st Law Analysis of Chemical Reaction 8.1.2 Work of Chemical Reaction Work Volumetric Work Non-volumetric Work W We Example: Electricity by Fuel Cell W W W tot e = +
8.1 1st Law Analysis of Chemical Reaction8.1.3 Heat of Chemical ReactionDefinition:The heat transferred between system and surroundingsduring chemical reaction.Q > 0: heat transfer to the systemQ < O: heat transfer from the systemQ = O: adiabatic
8.1 1st Law Analysis of Chemical Reaction 8.1.3 Heat of Chemical Reaction Definition: The heat transferred between system and surroundings during chemical reaction. Q > 0: heat transfer to the system Q < 0: heat transfer from the system Q = 0: adiabatic
8.1 1st Law Analysis of Chemical Reaction8.1.4 1st Law of Chemical ReactionQ=△U+Wot =U,-Ur+W+WSQ=dU +W=dU,-dU,+$W+SW01ProductReact
8.1 1st Law Analysis of Chemical Reaction 8.1.4 1st Law of Chemical Reaction Q U W U U W W = + = − + + tot P R e δ d δ d d δ δ Q U W U U W W = + = − + + tot P R e Product React