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 $_{r x n}$ = H $_{p ro d u c t s}$ - H $_{re a c t an t s}$

$△$ H $_{r x n}$ = heat released or absorbed during a reaction at constant pressure

Endothermic: (Surroundings get cooler) H $_{p ro d u c t s}$ > H $_{re a c t an t s}$

$△$ H > 0; +

Exothermic: (Surroundings get warmer) H $_{p ro d u c t s}$ < H $_{re a c t an t s}$

$△$ H < 0; -

Surroundings:

Ayush Garg