Question

s law allows you to find the net enthalpy of the magnesium combustion by adding the enthalpies of intermediate reactions. done

Explanation:

The law that allows finding the net enthalpy of a reaction (like magnesium combustion) by adding enthalpies of intermediate reactions is Hess's Law. This is a key concept in Chemistry (a subfield of Natural Science) related to thermochemistry, where Hess's Law states that the total enthalpy change of a reaction is independent of the path taken, so we can sum enthalpies of individual steps (intermediate reactions) to get the net enthalpy.

Answer:

Hess