When a 5.49-g sample of gaseous hydrogen bromide dissolves in 33.0 g of water in a coffee-cup calorimeter (see above figure) the temperature rises from 21.00 oC to 62.66 oC. Calculate H in kJ/mol HBr for the solution process.
HBr(g) H+(aq) + Br-(aq)
The specific heat of water is 4.18 J/g-K.
Hsolution = kJ/mol HBr.