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Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s)+O2(g)2PbO(s)H=434.6kJ (2) 2Zn(s)+O2(g)2ZnO(s)H=696.6kJ What is the standard enthalpy change for the following reaction? (3)

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Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s)+O2(g)2PbO(s)H=434.6kJ (2) 2Zn(s)+O2(g)2ZnO(s)H=696.6kJ What is the standard enthalpy change for the following reaction? (3) PbO(s)+Zn(s)Pb(s)+ZnO(s)H= ? Standard enthalpy change = kJ

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