How are DeltaH_"reaction"^(@) assessed?

1 Answer
anor277
Apr 27, 2017

DeltaH is not accessed by calculation..........

Explanation:

DeltaH_"rxn"^@ is accessed by measurement. Look in your text for DeltaH_f^@ for MgO.

DeltaH_f^@ values are extensively tabulated, and represents the enthalpy change associated with 1 mol of substance from its elements in their standard states at 298*K.

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