4.已知电池Pt, _(2)((p)^0)|HCl(a=0.1)|(Cl)_(2)((p)^0) ,Pt(已知 (varphi )^0((Cl)^-/(Cl)_(2))=1.3583V )-|||-(1)写出电极及电池反应;-|||-(2)计算298K时电池电动势;-|||-(3)计算电池反应的 Delta G ,