Hess's Law Flashcards by N Bee | Brainscape

Q

What is Hess’s Law?

A

delta H = sum of bond energies in REACTANTS — sum of bond energies of PRODUCTS

delta H = means change in enthalpy

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Q

What does negative delta H mean?

A

Exothermic reaction

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Q

What does positive delta H mean?

A

Endothermic reaction

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