What are endothermic and exothermic changes ?
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All chemical reactions involve the transfer of energy. Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy. Exothermic processes release energy upon completion, and are signified by a negative change in enthalpy.
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Endothermic reaction is a processes that does an input of energy to proceed and are signified by a positive change in enthalpy.
Exothermic reaction is a processes that releases energy upon completion, and are signified by a negative change in enthalpy.
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