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32 Formula State of Matter Enthalpy (kJ/mol) Entropy (J mol/K) Gibbs Free Energy (kJ/mol) Al(NO 3) 3•6H 2O (s) -2850.47552 467.7712 -2203.88016 Al(NO 3) 3•9H 2O (s) -3757.06464 569.024 -2929.6368 Al(OH) 3 (s) -1284.488 71.128 -1305.8264 Al+3 (aq) -531.368 -321.7496 -485.344 Al 2(CH 3) 6 (g) -230.91496 524.6736 -9.79056 Al 2(SO 4) 3 (s) -3435.064 239.3248 -3506.6104
Table A–23 Ideal-gas properties of water vapor, H 2 O Table A–24 Ideal-gas properties of monatomic ... and absolute entropy at 25°C, 1 atm Table A–27 Properties of some common fuels and hydrocarbons Table A–28 Natural logarithms of the equilibrium constant K p Figure A–29 Generalized enthalpy departure chart Figure A–30 Generalized ...
Explore a comprehensive table of thermodynamic values provided by the University of Wisconsin–Madison.
Standard Entropies. All standard state, 25 °C and 1 bar (written to 1 decimal place). P.J. Linstrom and W.G. Mallard, Eds, NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg MD, 20899, http://webbook.nist.gov, (retrieved March 9, 2011).
Values of the standard molar entropies of various substances at 298 K (25°C) are given in the table. A table like this can be used in much the same way as a table of standard enthalpies of formation in order to find the entropy change ΔS m ° for a reaction occurring at standard pressure and at 298 K.
Standard Heats and Free Energies of Formation and Absolute Entropies of Elements and Inorganic Compounds
Table of contents. Introduction. Predicting Entropy Changes. Phase Changes. Temperature Changes. Mixing (Dissolution) Reactions that Change the Number of Particles. Size (Complexity) of Molecules. Standard State Entropies. Molar Entropy. Entropy of Reaction. Contributors and Attributions. Introduction.
Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty. The term and the concept are used in diverse fields, from classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, and to the principles of information theory.
Standard Thermodynamic Quantities for Chemical Substances at 25°C. Source of data: CRC Handbook of Chemistry and Physics,84th Edition (2004).
Entropy is a measure of the randomness or disorder of a system. Its symbol is the capital letter S. Typical units are joules per kelvin (J/K). Change in entropy can have a positive (more disordered) or negative (less disordered) value. In the natural world, entropy tends to increase.