What is Standard Enthalpy Change of Formation? [1 mark Q&A]

What is Standard Enthalpy Change of Formation? [1 Mark Q&A] – qChem+ chemistry featured image explaining standard enthalpy change of formation (ΔH°f), showing the formation of one mole of a compound from its elements in their standard states for HSC, SSC, O Level, AS Level, and A Level Chemistry students.

What is Standard Enthalpy Change of Formation?

The change in enthalpy when exactly 1 mole of a compound is formed from its constituent elements in their standard states under standard conditions (298 K temp. and 1 atm pressure), is known as standard enthalpy change of formation.

Symbol:

ΔHf\Delta H^\circ_f

Unit: kJ/mol

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