is the reaction between zinc and HCl exothermic or endothermic
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Yes there is bond formation, hence exothermic, negative enthalpy change in rate of reactive (-ve delta H), energy is released. Acid metal reactions usually produce a salt, in this case, zinc chloride and hydrogen gas. ... That's due to heat energy which is being released from the reaction.
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its n exothermic reaction. ....
which also result in evolution of has H2
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