How can one understand if it is an endothermic or an exothermic reaction when the chemical reaction is given in words?
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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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for exothermic reactions, when you touch carefully the test tube, its heating, but incase if endothermic nothing such case happens
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