Endothermic and Exothermic are two terms used to describe what happens to the energy of a system undergoing a change.
Endothermic processes require energy to take place. The system has to absorb energy from its surroundings. Eg : ice melting
Exothermic processes give off energy. The system releases energy to the surroundings. Eg : water freezing
Very nice information for Exothermic Welding System provide contact surface area is 100% not analogous to any chance of oxidation. The technology is mainly used in higher applications like rail tracks, etc.
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