Heat of formation by substances
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This document provides a table of standard enthalpies of formation (ΔHformation) in kJ/mol for various common substances. It notes that Hess's law can be used to calculate the standard enthalpy of a reaction (ΔHrx) from the standard enthalpies of formation of the products and reactants. The table lists the ΔHformation values for over 30 different elements and compounds.
Heat of formation by substances
- 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