A scientist measures the standard enthalpy change for the following reaction to be -910.7 kJ: 2NH3(g) + 3 N2O(g)4N2(g) + 3 H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is  ??kJ/mol.

Chemistry: Principles and Practice
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Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
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Chapter5: Thermochemistry
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A scientist measures the standard enthalpy change for the following reaction to be -910.7 kJ:

2NH3(g) + 3 N2O(g)4N2(g) + 3 H2O(g)

Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is  ??kJ/mol.

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