Hess's Law

[Timmy Nguyen Dis 1I]

What is this and what can you do with this?

[Mulin_Li_2J]

Basically what Hess's Law says is that enthalpy changes can be additive, mainly because enthalpy is a state property. For a reaction at given temperature and pressure, the enthalpy change of the reaction remains the same no matter how many times you conduct the reaction. So if you know the enthalpy changes for two reactions, then you will know the total change of enthalpy if the two reactions happen together simply by adding them together because enthalpy changes can be additive.

Hope this can help! =_-

[Altamash Mahsud 1I]

What Hess's law states is that because enthalpy is a state function, enthalpies of reaction can be added together. This means when two or more chemical reactions are added together to get a net reaction, you can get the net enthalpy of reaction by adding the separate enthalpies of reaction of the combined chemical reactions, if that makes sense. 0.0

[RobertXu_2J]

Hess's law states that the total enthalpy change during the complete course of a chemical reaction is the sum of its parts. Basically, it's stating that enthalpy can be added.

[RobertXu_2J]

Hess's law states that the total enthalpy change during the complete course of a chemical reaction is the sum of its parts. Basically, it's stating that enthalpy can be added.

[BritneyP- 2c]

Hess' law states that enthalpy is a state function which also means that it is additive, meaning 2 or more chemical reactions can be added together.

[Veronica Lu 2H]

Two or more reactions can be added together

[Sally Qiu 2E]

hess's law is basically stating that because enthalpy is a state function, enthalpy is additive. you can simply add the enthalpies of reactions; regardless of how many steps a reaction has, the total enthalpy change is just the sum of all changes