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H₂(g) + ½ O₂(g) -> H₂O(g) ∆H = -241,6 kJ
H₂O(l) -> H₂O(s) ∆H = -5,9 kJ
menjadi
H₂O(l) -> H₂(g) + ½ O₂(g) ∆H = +285,5 kJ
H₂(g) + ½ O₂(g) -> H₂O(g) ∆H = -241,6 kJ
H₂O(s) -> H₂O(l) ∆H = +5,9 kJ
yang dibold bisa dicoret
H₂O(s) -> H₂O(g) ∆H = +49,8 kJ
bener ndak dam?