Question

When a 9.55 g sample of solid NaOH(s)

dissolve in 100.00 g of water in a coffeecup

calorimeter, the temperature rises from

23.6 oC to 47.4 oC. Calculate the ?H

(kJ/mol of NaOH) for the solution process

assuming that specific heat of the solution

is the same as that of pure water.

? Assume that the specific heat and density

of the resulting solution are equal to those

of water (4.18 J/g.K and 1.00g/mL) and

that no heat is lost to the calorimeter itself.