EnDoTheRmIc PrOcEss

Endothermic, also incorrectly known as endergonic, refers to a transformation in which a system receives heat from the surroundings:

• Q > 0

When the transformation occurs at constant pressure:

• ∆H > 0

and constant volume:

• ∆U > 0

If the surroundings do not supply heat (e.g., when the system is adiabatic), an endothermic transformation leads to a decrease in the temperature of the system.

Some examples of endothermic processes are:

• Melting of ice
  


• Depressurising a pressure can