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heat will be absorbed and the products will be formed faster exothermic reaction will undergo spontaneously as it does not require any energy while endothermic reaction has to be supplied with energy to happen therefore exothermic reaction will be faster than endothermic reaction
Lesson 1: Exothermic and endothermic reactions. When a chemical reaction happens, energy is transferred to or from the surroundings and often there is. a temperature change. For example, when a fire burns it transfers heat energy to the surroundings. Objects near a fire become warmer and the temperature rise can be measured with a thermometer. Exothermic reactions.