Air at atmospheric pressure is blown over a Cu-rich coppergold liquid solution at 1200 oC. If only the copper is oxidized (to form pure solid Cu2O), calculate the minimum activity of Cu which can be obtained in the solution.

3.(30) a) Air at atmospheric pressure is blown over a Cu-rich copper-gold liquid solution at 1200C. If only the copper is oxidized (to form pure solid Cu2O ), calculate the minimum activity of Cu which can be obtained in the solution. 2Cu(1)+O2=2Cu2OG=188,300+88.48T between 13561509K b) Calculate the minimum activity of Cu using Ellingham diagram only. 1. rqure lals 1 ne Eingnam aragrarn aor sevccted uxucs