Question

When a 6.50-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 21.6 to 37.8 °C. (a) Calculate the quantity of heat (in kJ) released in the reaction. (b) Using your result from part (a), calculate ∆H (in kJ/mol NaOH) for the solution process. Assume that the specific heat of the solution is the same as that of pure water.