Enthalpy

Enthalpy (H) is used to quantify the heat flow into or out of a system in a process that occurs at constant pressure

In other words Enthalpy equals Heat

H = H - H

H = heat released or absorbed during a reaction at constant pressure

Endothermic: (Surroundings get cooler) H > H

H > 0; +

Exothermic: (Surroundings get warmer) H < H

H < 0; -

Surroundings:

• A flask is a surrounding for the solution inside of it
• If we hold a flask we’re the surroundings