If the tempurature of the combined solution rises to 27.8, Ask an Expert

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After 1.02 grams of NaOH are dissolved in 50.0 grams of water, and the solution cools to room tempurature of 21.5 degrees C, it is combined with an excess of HCl dissolved in 50.0 g of water at 21.5 degree C (so NaOH is the limitng reactant). If the tempurature of the combined solution rises to 27.8 degree C what is the DeltaHrxn (delta heat reaction) (in kJ/mole) for this process?

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