Final answer:
The energy transferred when one mole of a compound is formed from its elements in their standard states is the standard molar enthalpy of formation.
Step-by-step explanation:
The amount of energy that is transferred when one mole of a compound is formed from its component elements in their standard states is known as the standard molar enthalpy of formation (ΔH°f). This value represents the enthalpy change when 1 mol of a substance is created from its elemental constituents in their most stable form under standard conditions. The standard enthalpy of formation of the most stable form of any pure element is defined to be zero. These values are crucial for predicting or computing the enthalpy changes for chemical reactions, and are particularly important when certain reactions are either too dangerous or impractical to carry out, or when they are challenging to measure.