An exothermic reaction . In an endothermic reaction, the energy of the products is the energy of the reactants.
Activation energy is the potential energy of the products.

Explanation:

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while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.