What does Hess's Law state regarding chemical reactions?

A.
The enthalpy change of a reaction depends on the physical state of the reactants and products.
B.
The total enthalpy change of a reaction is the sum of the enthalpy changes of its individual steps.
C.
The enthalpy change of a reaction is zero because energy is conserved.
D.
Hess's Law is not applicable to endothermic reactions.
Chemistry
AP
College Board
Exam No:AP Chemistry Problem Set 3 Year:2024 Question No:APChemistry2024AP0508

Answer:

B

Knowledge points:

6.9 Hess’s Law

Solution:

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