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What are the uses of Hess …

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What are the uses of Hess law?

Posted by Priyanka Pandey 7 years, 10 months ago

CBSE > Class 11 > Physics

1 answers

Sajid Khan 7 years, 10 months ago

Hess's Law of Constant Heat Summation is useful in the determination of enthalpies of the following:[1] Heats of very slow reactions Heats of formation of unstable intermediates like CO(g) and NO(g). Heat changes in phase transitions and allotropic transitions. Lattice energies of ionic substances by constructing Born-Haber cycles if the electron affinity to form the anion is known, or Electron affinities using a Born-Haber cycle with a theoretical lattice energy

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