What best describe the enthalpy of formation is that it is the energy change that happens when a substance forms from its elements
Option b
This goes to say that it is the heat change which occurred when one mole of substance is formed from its constituent elements.
What is enthalpy?
Enthalpy can be defined as the sum total of the internal energy and the product of the pressure and volume of a system
So therefore, the entalphy of formation is
the energy change that happens when a substance forms from its
elements
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