what is meant by enthalpy of formation? give its significance
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It is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.
Measuring the change in enthalpy allows us to determine whether a reaction was endothermic (absorbed heat, positive change in enthalpy) or exothermic (released heat, a negative change in enthalpy.) It is used to calculate the heat of reaction of a chemical process.
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the standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of one mole of the substance in their standerd states....
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