Endothermic process

Thermodynamic process absorbing energy from its surroundings

An endothermic process is a chemical or physical process that absorbs heat from its surroundings. In terms of thermodynamics, it is a thermodynamic process with an increase in the enthalpy H (or internal energy U) of the system. In an endothermic process, the heat that a system absorbs is thermal energy transfer into the system.

From Wikipedia, under CC BY-SA. More on occurri.