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2. Calculate the enthalpy change to be expected for the reaction NaCl(s) --> NaCl(aq).
Use Hess's law, an enthalpy change that was measured in this experiment, and the
data from the following table:
Reaction DH (kJ/mol)
1/2 H2(g) + 1/2 Cl2(g) --> HCl(g) –92.3
Na(s) + 1/2 O2(g) + 1/2 H2(g) --> NaOH(s) –426.8
Na(s) + 1/2 Cl2(g) --> NaCl(s) –411.1
H2(g) + 1/2 O2(g) --> H2O(l) –285.8
HCl(g) --> HCl(aq) –75.2
NaOH(s) --> NaOH(aq) –41.8



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