September 2018 1 132 Report
1. Data entalpi pembentukan standar:
c₃H₈ = -104 KJ/mol
CO₂ = -394 KJ/mol
H₂O = -286 KJ/mol
tentukan harga ∆H reaksi: C₃H₈ + 5O₂ → 3CO₂ + 4H₂0

2. Diketaui
∆H⁰f C₂H₄ = 42KJ/mol
∆H⁰f CO₂ = -393,5 KJ/mol
∆H⁰f H₂O =-285,8 KJ/mol
kalor yang dilepas untuk membakar 5,6 gram gas C₂H₄ adalah

3. Diketahui reaksi penguraian:
CaCO₃ → CaO + CO₂ ∆H= 143 KJ
Jika ∆H⁰f CaO = - 734 KJ/mol, ∆H⁰f CO₂ = -393,5 KJ/mol. maka ∆H pembentukan standar CaCO₃ adalah

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