Measurements show that the enthalpy of a mixture of gaseous reactants increases by 181. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change is determined that -102. kJ of work is done on the mixture during the reaction. Calculate the change in energy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. kJ x10 exothermic Is the reaction exothermic or endothermic? endothermic

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A: Given reaction is:    Zn (s) + 2 HCl (aq) → ZnCl2 (aq) + H2 (g)

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Q: Consider the exothermic reaction 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)4NH3(g)+5O2(g)→4NO(g)+6H2O(g)…

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