The standard enthalpy of formation of chloroform (CHCl₃) is -103.1 kJ/mol.

This value represents the enthalpy change when one mole of chloroform is formed from its elements in their standard states under standard conditions (298 K and 1 atm).

It's important to note that this value is negative, indicating that the formation of chloroform from its elements is an exothermic process, meaning that heat is released during the reaction.