Hess's law

[Shawn Suen]

what is Hess's Law?

[Muryam_Hasan_2I]

Hess's law basically states that enthalpy changes are additive, meaning that the change in enthalpy for each step of a reaction can be added to result in the total enthalpy change. In a problem, if you add two reactions together, the enthalpy of the subsequent net reaction is the sum of each added reaction's enthalpy change.

[isabella garcia - 1G]

Hess's law essentially dictates that enthalpy changes are state functions, meaning that the intermediate steps in enthalpy changes don't matter and enthalpy changes are additive.

[Joanne Sarsam 2F]

Hess's law explains that the overall change in enthalpy of a reaction is equal to the sums of the enthalpies of reaction each of the reactions that make up the overall reactions. This law works because enthalpy is a state function, aka it doesn't matter the pathway to the heat change. So, the law states that the enthalpy of reaction= enthalpy of formation of products - enthalpy of formation of reactants

[Omer_Abdelrahim_1B]

I think it says that enthalpy is a state function. I think the professor doesn't touch on the name much because it implies that being a state function is a property that only enthalpy has, when in reality ther are many important state functions.

[Samantha Loc 1B]

Hess's law states that the overall enthalpy of a reaction is the sum of the reaction enthalpies of the steps into which the reaction is divided.

[Alexandra Gill]

Hess's law says the state functions are additive and since enthalpy is a state function, the overall rxn enthalpy will be the sum of the reaction enthalpies.

[Alekhya_Pantula_2E]

Hess's law states that state properties are additive so things like enthalpy, temperature, altitude are all state properties and can be added to find the total amount. Same with enthalpy, we can use Hess's Law to find the overall change in enthalpy.

[LukeYing_3H]

Hess's Law essentially states that state properties are additive so things like enthalpy, temperature, altitude are all state properties and can be added to find the total amount. Same with enthalpy, we can use Hess's Law to find the overall change in enthalpy.

[Renga Rengappa 1D]

From my understanding, Hess' Law states that the enthalpy change of a reaction does not depend on its intermediate steps, but rather only its beginning and end steps.