When a 9.55-g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (Figure 5.17), the temperature rises from 23.6°C to 47.4°C. Calculate ΔH (in kJ/mol NaOH) for the solution process
NaOH(s) → Na+(aq) + OH–(aq)
Assume that the specific heat of the solution is the same as that of pure water.
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