nomor 8

CS₂ + O₂ --> CO₂ + SO₂

CS₂ + 3O₂ --> CO₂ + 2SO₂

-80x + 0 --> -394 + 2.(-298)
-80x + 0 --> -394 – 596

-80x + 0 --> -990

∆Hf = produk – reaktan

306 = -990 – (-80x)

306 = -990 + 80x

80x = 1296

X   = 1296 : 80

X   = 16,2 mol

Mass = mr . mol

     = 76 . 16,2

     = 1231,2 gr