Jawabanmu

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2014-09-06T12:14:28+07:00
H2 + 1/2 O2 --> H2O. ΔHf = -285 kJ/mol
H2 + O2 --> H2O2. ΔHf = -180 kJ/mol

H2O2 --> H2 + O2 ΔH = + 180 kJ/mol
H2 + 1/2 O2 --> H2O. ΔH = - 285 kJ/mol
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H2O2 --> H2O + 1/2 O2. ΔH = - 105 kJ/mol. X 2

maka:
2H2O2 --> 2H2O + O2. ΔH= - 210 kJ/mol

semoga bermanfaat



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