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Given that Zn + ½ O2 --> ZnO + 35.28 kj HgO --> Hg + ½ O2 - 9.11 kj so the heat of reaction Zn + HgO --> ZnO + Hg is 1. 26.17 kj 2. 44.39 kj 3. -44.39 kj 4. 2.617 kj.
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