Question

A scientist measures the standard enthalpy change for the following reaction to be -48.4 kJ:

Ca(OH)2(aq) + 2 HCl(aq)CaCl2(s) + 2 H2O(l)

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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Chemical Thermodynamics

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