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A scientist measures the standard enthalpy change for the following reaction to be -340.2 kJ :...

A scientist measures the standard enthalpy change for the following reaction to be -340.2 kJ : 2Na(s) + 2 H2O(l)2NaOH(aq) + H2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(l) is ____________kJ/mol.

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