Question

How can I do Hess's law with fractions?

Answer 1

Check the attachment :)

Thanks :)

Answer 2

Hess's law states that the change of enthalpy in a chemical reaction (i.e. the heat of reaction at constant pressure) is independent of the pathway between the initial and final states. ... Hess's law allows the enthalpy change (ΔH) for a reaction to be calculated even when it cannot be measured directly.