Heat of formation by substances

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A list of substances and related enthalpies that can be used for Hess's Law calculations.

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Heat of formation by substances

  1. 1. C06 Enthalpy Table Standard Heats of Formation, ΔHformation Hess’s Law, ΔHrx = ΣΔHformation products - ΣΔHformation reactants Standard Enthalpy of Formation Table ΔHformation Substance kJ/mol Al(s) 0 Al2O3(s) -1670 C(s, graphite) 0 CO (g) -111 CO2 (g) -394 CH4 (g) -75 CH3OH (l) -239 C2H2 (g) 227 C2H4 (g) 52 C2H6 (g) -85 C2H5OH (l) -278 CaO (s) -636 Ca(OH)2 (s) -987 CaSO4(s) -1433 Cl2 (g) 0 Fe2O3 (s) -822 H2 (g) 0 HCl(g) -92 H2O (g) -242 H2O (l) -286 H2O2 (l) -188 H2SO4 (l) -811 Hg (l) 0 Hg (g) 61 MgO(s) -602 N2 (g) 0 NH3 (g) -46 NH4Cl(s) -315 N2O (g) 82 N2O4 (g) 10 NaCl (s) -411 NaOH (s) -427 O2 (g) 0 P4O10(s) -2980 S(s) 0 SO2 (g) -297 SO3 (g) -395

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