/ November 14, 2020/ Uncategorized/ 0 comments

The standard enthalpy of formation or standard heat of formation of a compound is the … The standard enthalpy of formation of any element in its standard state is zero by definition. For example, although oxygen can exist as ozone (O 3), atomic oxygen (O), and molecular oxygen (O 2), O 2 is the most stable form at 1 atm pressure and 25°C. To understand standard enthalpy of formation of O2 Equal to Zero, you need to understand the definition of standard enthalpy of formation.This is the change of enthalpy when one mole of a substance in its standard state is formed from its elements under standard state conditions of 1 atmosphere pressure and 298K temperature. The standard enthalpy of formation of any element in its most stable form is zero by definition.

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