Exothermic reactions release heat, while endothermic reactions absorb heat, affecting the temperature in different ways.
An exothermic reaction releases heat, such as the combustion in a torch, while an endothermic reaction absorbs heat, like in a cold pack for muscle strains. In an exothermic reaction, energy is being released to the surroundings, often causing a temperature increase. Conversely, an endothermic reaction takes in energy, leading to a decrease in temperature.
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