For The Reaction H2 G 0 5 O2 G H20 G The Standard Reaction Enthalpy Ahr 298 Is 241 8 Kj Mol Use The He 1 (50.41 KiB) Viewed 82 times
For The Reaction H2 G 0 5 O2 G H20 G The Standard Reaction Enthalpy Ahr 298 Is 241 8 Kj Mol Use The He 2 (63.31 KiB) Viewed 82 times
For the reaction: H2 (g) + 0.5 O2 (g) → H20 (g) - the standard reaction enthalpy, (AHR)298 is – 241.8 kJ/mol. Use the heat capacity data to estimate the reaction enthalpy at 100°C. Ср J K mol H2 (g) 28.84 29.37 O2 (g) H20 (g) 33.58 (assume Cp is constant in range 298 - 373 K)
thermodynamic relationships internal energy U = q + w enthalpy H = U + PV AH = AU + PAV gas law PV = nRT where R = 8.314 J/ mol K Hess's Law: AHR = [SAH products - [SAH) reactants = Kirchhoff's rule: (AHRST, -(AHRT, = (ACp (T2-T1) where: ACp = (Cp)(products) - E(Cp(reactants) standard molar entropy of a phase transition: AH ASE = Gibbs free energy: G = H - TS AG = AH – TAS -
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