Apabila diketahui :
2Fe(s) + O2(J) _ 2FeO(s) ∆H = 944 KJ
4Fe(s) + 3O2(J) _ 2FeO3(s) ∆H = 1648,4
KJ
Fe3O4(s)_3Fe(s) + 2O2(J) ∆H = 1118,4 KJ
∆H dari reaksi
FeO(s) + Fe2O3(s) _ Fe3O4(s) sebesar....?KJ
2Fe(s) + O2(J) _ 2FeO(s) ∆H = 944 KJ
4Fe(s) + 3O2(J) _ 2FeO3(s) ∆H = 1648,4
KJ
Fe3O4(s)_3Fe(s) + 2O2(J) ∆H = 1118,4 KJ
∆H dari reaksi
FeO(s) + Fe2O3(s) _ Fe3O4(s) sebesar....?KJ
Gyoku
944 + 1648,4 + 1118,4 = 3710,8KJ
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