PPT Slide

Calculations of Entropy Changes

• Absolute entropy can be determined from complicated measurements.

• Standard molar entropy, S_: entropy of a substance in its standard state. Similar in concept to _H_.

• Units: J/mol-K. Note units of _H: kJ/mol.

• Standard molar entropies of elements are not zero.

• For a chemical reaction which produces n products from m reactants:

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