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Verified answer
No 10CS2 + 3O2 => CO2 + 2SO2 ΔH = - 1110 kJ
CO2 => C + O2 ΔH = 394 kJ
SO2 => S + O2 ΔH = 287 kJ x2
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CS2 => C + 2 S ΔH = -142 kJ
pembentukan CS2
C + 2S => CS2 ΔH = 142kJ
ini jawabannya tapi ga ada di pilihan
kalau entalpi yang SO2 => S + O2 ΔH = 297 kJ
baru ada jawabannya 122 KJ
no 20 D
ΔH = ΔH N2O4 - 2 x ΔH NO2
= a- 2b kJ