According to Hess’s law, if a series of intermediate reactions are combined, the enthalpy change of the overall reaction is
Answer
A
the difference between the enthalpies of the intermediate reactions.
B
the sum of the enthalpy changes of the intermediate reactions.
C
the fraction of the individual enthalpies of the intermediate reactions.
D
the product of the enthalpy changes of the intermediate reactions.
Explanation
Hess’s law says that the enthalpy change for an overall reaction equals the sum of the enthalpy changes for the steps that combine to make it. Therefore, the correct choice is “the sum of the enthalpy changes of the intermediate reactions.”
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