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Jawabannya:Pelajaran : Kimia
Materi : Termokimia
Kelas : XI IPA
Pembahasan:
Dik:
S + O2 →→ SO2 ∆H = -296,8 Kj
2SO2 + O2 →→ 2SO3 ∆H= -197,8
reaksi(1) dan (2) Dibalik
Jadi:
SO2 → S + O2 ∆H= -296,8 Kj
SO3 → SO2 + 1/2 O2 = -197,8/2 → 98,9 Kj
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Jadi Entalpi reaksi dari S + O2 → SO3 ∆H= -197,9
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