To a calorimeter containing 400.0 g of water at 20.00 C, 12.65 g of NaOH, also at 20.00 C was added.

To a calorimeter containing 400.0 g of water at 20.00 °C, 12.65 g of NaOH, also at 20.00 °C was added. The temperature change, which was monitored by a digital probe with negligible heat capacity stopped when it reached a temperature of 29.35 °C. If the specific heat of the mixture is 4.184 J g-1 °C-1, and the small heat capacity of the calorimeter is ignored, what is the heat evolved, per mole of sodium hydroxide?