enthalpy

[Renee Grange 1I]

What is enthalpy?

[Deepika Reddy 1A]

Enthalpy is the heat of the reaction. If it is negative, then the reaction is exothermic. If it is positive, then the reaction is endothermic.

[005206171]

At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

[Amy Pham 1D]

At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

Further, this is because at constant pressure the volume of reactants equals the volume of products, meaning that there was no expansion work in the reaction and the work term (w) in the equation equals zero.

[Kavya Immadisetty 2B]

Enthalpy is the amount of heat absorbed or released by a reaction if there is no expansion work

[005162902]

What is enthalpy?

Enthalpy is the heat entering or exiting the system. If the change in enthalpy (delta H) is negative then the reaction is exothermic. If the change in enthalpy is positive, then the reaction is gaining heat and therefore endothermic.

[Kayli Choy 2F]

Furthermore, enthalpy is a state property, which means that it is not dependent on the path take to obtain that state. Therefore, you can add/subtract enthalpies to find the total change in enthalpy.

[605395381]

Enthalpy is the amount of heat released or absorbed when the rxn is at a constant pressure