For an exothermic reaction * only enthalpy change (AH)is negative enthalpy change is zero only internal...

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For an exothermic reaction * only enthalpy change (AH)is negative enthalpy change is zero only internal energy change (AU) is negative both AH and AU are negative Melting of wax is accompanied with constant entropy none of these increase in entropy decrease in entropy For an exothermic reaction * only enthalpy change (AH)is negative enthalpy change is zero only internal energy change (AU) is negative both AH and AU are negative Melting of wax is accompanied with constant entropy none of these increase in entropy decrease in entropy