Enthalpy of a reaction

[705596384]

How do we calculate the enthalpy of a reaction when provided multiple delta H? How would we approach a problem with multiple delta H?

[Daljit Takher 1B]

depends in the case we are given the delta h of the reactants and products

in the case we take the sum of change in enthalpy of the products and subtract it from the reactants
this equation is on the equation sheet

[radhika singh 1A]

With enthalpy of a reaction we subtract the enthalpy of the products minus the enthalpy of the reactants.
this is different than bond enthalpy which is the enthalpy of bonds broken - bonds formed.

Enthalpy is a state function which allows us to use the first equation to solve for enthalpy of the reaction.

[Omeed Kalan]

Depends on what delta H you are given, for example, if given reactants and products, then you subtract delta H of products from delta H of reactants.

[trucle_2I]

Given delta H of the reactants and the products, subtracting delta H of the reactants from delta H of the products will give you the enthalpy of the entire reaction

[Aeson Salcedo 3L]

It depends which delta H is assigned to products and which one is assigned to the reactants.

[Kailyn Kennada 3E]

Hi there!
It is important to differentiate adding enthalpies of reactions versus equilibrium constants. In enthalpies, when looking at the reaction equations and their delta H, you simply add them together. If you have to double a reaction to get the proper number of reactants and products, you would simply multiply by two the enthalpy. If for instance you have to reverse the reaction, you would simply switch the sign of the enthalpy from + to - or vice versa. Either way make sure to recognize this concept as completely separate from chemical equilibrium in order to not get confused :)