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An electrochemical cell is set up so that the reaction described by the unbalanced equation below occurs. At 25°C, the standard cell voltage is 0.65 V. What is the ΔG°rxn in kilojoules/mol?
NO₃⁻ (aq) + H⁺ (aq) + Cu (s) ⟶ NO₂ (g) + H₂O (l) + Cu²⁺ (aq)