When a 6.50 g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter (the following Figure), the temperature rises from 21.6°C to 37.8°C.
Calculate ΔH (in kJ/mol NaOH) for the solution process
NaOH(g) → Na+(aq) + OH-(aq)
Assume that the specific heat of the solution is the same as that of pure water.
Express your answer with the appropriate units.
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