The standard enthalpy of formation of a compound is the enthalpy change associated with the reaction that generates mole(s) of that compound from its component when all of the substances are under conditions.
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Step 1: The standard enthalpy of formation of a compound is the enthalpy change associated with the reaction that generates one mole of that compound from its elements. Show more…
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The heat of formation is the change in enthalpy accompanying the formation of a substance fromits elements at $298 \mathrm{~K}$ and 1 atm pressure. Since the enthalpies of elements in their most stable state are taken to be zero, the heat of formation of compound is (1) always negative (2) always positive (3) standard heat enthalpy of that compound (4) zero
The standard enthalpy change for the following reaction is $436.4 \mathrm{kJ} / \mathrm{mol}$ : $$\mathrm{H}_{2}(g) \longrightarrow \mathrm{H}(g)+\mathrm{H}(g)$$ Calculate the standard enthalpy of formation of atomic hydrogen (H).
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