Enthalpy change of a reaction is the sum of enthalpy changes of individual steps

Gibbs free energy determines spontaneity

Enthalpy change of a reaction is the sum of enthalpy changes of individual steps

Energy cannot be created or destroyed

What is Hess's Law? - CHEMICAL THERMODYNAMICS Quiz

Question

What is Hess's Law?

A. Entropy is always increasing
B. Gibbs free energy determines spontaneity
C. Enthalpy change of a reaction is the sum of enthalpy changes of individual steps
D. Energy cannot be created or destroyed