What is ΔH°f?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
ΔH°f represents the standard enthalpy of formation, which is the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states at standard conditions (usually 25°C and 1 atm pressure). The superscript ° indicates standard conditions, and the subscript f denotes formation. This value is zero for elements in their standard states.
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